Most independent reviews of the Tumbler Rolling Knife Sharpener are positive. Testers call it easy and "foolproof," and a measured sharpness test put its best edge well inside the sharp range. The common complaints are price, fixed discs, tricky tips and slow work on very dull knives. Nearly every review tested the Tumbler Original, not the Tumbler Pro.
Key Takeaways
- Most reviewers came away positive; America's Test Kitchen rated the Tumbler Original "Not Recommended."
- On Prudent Reviews' BESS sharpness scale, where lower is sharper, the Tumbler's best edge scored 198, inside the 0 to 400 "sharp and in good shape" range. Its second test knife scored 515.
- Nearly every published review of the Tumbler Rolling Knife Sharpener tested the Tumbler Original, not the Tumbler Pro.
- Tumbler's own guidance: about 2 to 12 minutes for a dull or neglected knife, and about 60 seconds for regular touch-ups.
This is Tumbler's own summary of independent reviews, checked October 5, 2026. We link every source so you can read the full review.
New to rolling sharpeners? Start with our complete guide to how rolling knife sharpeners work.
How we put this roundup together
- Included: ten editorial reviews that tested a Tumbler, each re-read on October 5, 2026. The table shows each outlet's date and the model it tested.
- Quoted: word for word, and only what each reviewer says about Tumbler.
- Labeled: forum posts appear only under "What do skeptics say?" and the one sample-based Tumbler Pro review only in the Pro section.
- Disclosed by the reviewers: The Gadgeteer says Tumbler provided its sample. GearJunkie's reviewer says the brand reached out to him. NBC Select's reviewer says the brand sent a Companion Strop.
- Not included: customer star ratings, or any test of our own.
What did each reviewer conclude?
Ten editorial reviews tested a Tumbler, and the table below gives each verdict in the reviewer's own words. Most are positive, NBC Select and Prudent Reviews are mixed, and America's Test Kitchen rated it "Not Recommended." Every review that names its model tested the Tumbler Original or its Starter Set; Prudent Reviews doesn't name one.
| Outlet | Last updated | Model tested | Verdict in their words | Main pro | Main con |
|---|---|---|---|---|---|
| Taste of Home | Sept. 8, 2026 | Tumbler Original | "works exactly as advertised" | "makes the entire process foolproof" | "Pricey"; not for serrated blades |
| The Kitchn | Aug. 3, 2026 | Tumbler Original | "Yes!" It "delivers on high-quality sharpening with ease and speed" | Quick follow-up sessions | Santoku tip was "tricky" |
| Prudent Reviews | June 15, 2026 | Not named (fixed discs, matching the Tumbler Original) | Mixed: "a great job" on one knife, "a subpar job" on another | Best BESS score of 198 (sharp range) | Discs can't be changed or replaced |
| Outdoor Life | Mar. 4, 2026 | Tumbler Original | "very solid, useable edges" | "Longest guarantee of all tested" | "Discs not replaceable" |
| America's Test Kitchen | July 9, 2025 | Tumbler Original set | "Not Recommended" | None listed | Couldn't reach the full length of the edge |
| The Gadgeteer | Jan. 29, 2025 | Tumbler Original (sample from Tumbler) | "an effective sharpening system for almost all knives" | Simple to use and store | "Seems expensive"; small knives slip |
| The Quality Edit | Jan. 16, 2025 | Tumbler Original set | "I recommend the Tumbler for anyone who is a serious home chef." | Paper-test cut went from about 1/4" to over 1" | "Fairly high price point" |
| NBC Select | Dec. 6, 2024 | Tumbler Original | "best as a frequent maintenance tool" | Keeps sharp knives sharp | Slow on very dull knives; "slightly scratchy sound" |
| GearJunkie | July 25, 2024 | Tumbler Original and Original Starter Set | 7.9 out of 10: "a no-brainer" | "insanely sharp with very minimal effort" | "Limited angles" |
| Pro Tool Reviews | Apr. 9, 2024 | Tumbler Original Starter Set | "appropriate for all skill levels" | Low heat build-up | "Slower sharpening process than other methods" |
What do reviewers like about the Tumbler?
Reviewers mostly praise how easy the Tumbler Original is to use and how sharp it gets a knife without freehand skill. Several also note quick follow-up sessions, a measured edge in the sharp range, low heat on the blade and a design good enough to leave on the counter. One outlet singled out its guarantee.
Ease of use comes up first. Taste of Home wrote: "The Tumbler knife sharpener works exactly as advertised. It sharpens well, it does it quickly and it makes the entire process foolproof." The Gadgeteer found it "simple to use and store."
Follow-ups go fast. From The Kitchn: "It's fast, taking no more than 10 minutes per knife on the first go around, and then just a minute or two for each follow-up session." Tumbler's own guidance is about 2 to 12 minutes for a dull or neglected knife and about 60 seconds for regular touch-ups.
The sharpness shows up on a meter. Prudent Reviews used a BESS edge tester, where lower scores are sharper and "a score from 0 to 400 means the edge is sharp and in good shape." After 300 passes per side, the Tumbler took one knife from 1,331 to 198. A second knife went from 1,127 to 515, in the 400 to 800 band where "the edge could use some maintenance." Prudent's summary: "Tumbler did a great job with the Wusthof Gourmet knife and a subpar job with the Cangshan Helena knife."
It shows up on paper too. In The Quality Edit's informal paper test, a cut went from "about a fourth of an inch" before sharpening to "over an inch long" after.
Pro Tool Reviews liked that the roller moves slowly across the blade: "That keeps the heat build-up to a minimum."
Build quality gets noticed. GearJunkie, which scored it 7.9 out of 10, wrote that "the build quality of the Tumbler itself and the magnetic angle guide were impressive," and Forbes called it "as stylish as it is functional."
Outdoor Life listed "Longest guarantee of all tested" as a pro and said the Tumbler "produced very solid, useable edges." Both the Tumbler Original and Tumbler Pro product pages list a lifetime warranty.
What do reviewers criticize, and what's our response?
The recurring criticisms are price, the Tumbler Original's fixed discs, tricky tips on curved blades, slow progress on very dull knives, only two angles, and no serrated or ceramic blades. Some are fair limits you should know before you buy. Others come down to technique or choosing the right model.
| Criticism | Who said it | What it means for you | Our response |
|---|---|---|---|
| It's pricey | Taste of Home, The Quality Edit, The Gadgeteer | It costs more than a basic pull-through. | You buy it once: the product pages list a lifetime warranty, Tumbler's FAQ says the diamond wheel "does not need to be replaced" if used properly, and returns run 30 days. More in our take on whether a rolling sharpener is worth it. |
| The discs aren't replaceable | Outdoor Life, Prudent Reviews | True of the Tumbler Original. Outdoor Life tested it, and Prudent's fixed-disc description matches it. | The "discs aren't replaceable" con applies to the Tumbler Original; the Tumbler Pro's discs are interchangeable. Our guide to how the Tumbler Pro's interchangeable discs work covers each one. |
| Tips and curved blades are tricky | The Kitchn (santoku tip), Taste of Home (chef's knife curve), America's Test Kitchen (full edge length) | The heel and curved tip take more care than the middle of the edge. | Technique helps: reposition the knife on the holder so the disc reaches the heel and tip. The basics are in our step-by-step rolling sharpener walkthrough. |
| Slow on very dull knives | NBC Select ("20 minutes to an hour to start to notice a difference"), Pro Tool Reviews | A long-neglected knife won't come back in one quick session. | Agreed. Expect about 2 to 12 minutes for a dull or neglected knife and about 60 seconds for regular touch-ups. A long-neglected knife may take more than one session. For chips and badly worn edges, the Tumbler Pro takes the Tumbler Coarse Diamond Disc #150, which fits Tumbler Pro models purchased after June 1, 2025 (look for the hex recess above the screw threads). It is not compatible with the Tumbler Original. |
| Only two angles | GearJunkie | The standard holder has 15° and 20° sides. | Those cover most kitchen knives (see which sharpening angle suits your kitchen knife). The Tumbler Knife Holder Pro has four sides: 10°, 15°, 20° and 25°. The Tumbler Mini Sharpening Set uses a 20°/25° block for small blades. |
| Small knives slip | The Gadgeteer | Small blades are harder to hold on a full-size block. | The Tumbler Mini Sharpening Set is built for paring, pocket, hunting, folding and EDC knives. |
| No serrated or ceramic knives | Taste of Home (serrated), Pro Tool Reviews (ceramic and non-ferrous blades) | Serrated and ceramic knives need another method. | Agreed. The Tumbler FAQ says the roller "is not suitable for serrations," and ceramic blades "cannot be fixed to the magnetic holder." Use a serrated-knife sharpener or a professional service. Tumbler can't sharpen scissors either. |
| A scratchy sound | NBC Select | You'll hear the abrasive on the steel. | Fair, and minor: it's the disc working. |
What did America's Test Kitchen say?
America's Test Kitchen rated the Tumbler Original Rolling Knife Sharpener Set "Not Recommended," giving it one of three stars for performance, ease of use and knife condition. The review says: "Its abrasive cylinder was too low to reach and sharpen the full length of our knife edge, and attempts to raise it did not help much."
On a knife with a shorter blade, America's Test Kitchen said results "remained poor and uneven along the blade," and "Minor scratches appeared on the side of our knife." The review was last updated July 9, 2025, and tested the Tumbler Original, not the Pro.
We won't argue with it. It matches what The Kitchn and Taste of Home noticed: the heel and tip take careful positioning, and our guide shows how to reach the heel and tip.
Has anyone reviewed the Tumbler Pro?
Not yet, as far as we can find: as of October 5, 2026, no major outlet has published a review of the Tumbler Pro. Every review in the table that names its model tested the Tumbler Original or its Starter Set, so "fixed discs" or "steel honing disc" in a review describes the Original.
The Tumbler Pro changes several things reviewers flagged:
- A 4-layer diamond disc and a heavier build.
- An EdgeBoost ceramic honing disc in place of the Original's steel one. Outdoor Life wrote that the Original's steel hone "isn't quite as effective at refining as a ceramic disc."
- Interchangeable discs, including the Tumbler Coarse Diamond Disc #150 for repair and the Tumbler Pro Whetstone Disc Set (3000/6000) for polishing. The Coarse Diamond Disc #150 and the Pro Whetstone Disc Set fit Tumbler Pro models purchased after June 1, 2025 (look for the hex recess above the screw threads). They are not compatible with the Tumbler Original.
One small review exists. Bartlow's BBQ, a barbecue shop's blog, reviewed a Pro sample that Tumbler sent and wrote, "I highly recommend the Tumbler Rolling Sharpener™ Pro for anyone serious about knife maintenance." Treat it as one sample-based opinion. To see the two models side by side, use the Tumbler sharpener comparison page.
What do skeptics say?
Knife enthusiasts are the toughest crowd. In a 2022 BladeForums thread titled "Tumblerware sharpener - too gimmicky?", the skepticism centered on price and audience, not test results. One member called it "a dressed up version of those cheap pull through sharpeners, but costing a lot more." Another summed up who it's for: "It's for non-enthusiast, non knife people" (BladeForums).
The second point is fair: the Tumbler is built for cooks who want a sharp knife without learning to hold an angle by hand. It isn't a pull-through, though. The knife sits at a fixed angle on a magnetic block while you roll a diamond disc along the edge, then a honing disc. Our guide to what cheap sharpeners can do to an edge explains the difference.
So, is the Tumbler knife sharpener good?
Yes, for most home cooks, and the published evidence backs that up. Reviewers found it easy, measured a sharp edge and saw a clear paper-test improvement. Expect a slower first session on a neglected knife and some practice at the tip. After that, upkeep is quick, and your knives cut like they should. Buying one as a present? Our gift guide for a dad who cooks picks a Tumbler set for each budget.
It suits home cooks who want a sharp edge without whetstone skill and like to sharpen little and often. It doesn't suit a household of serrated or ceramic knives, or a freehand sharpener with a full kit of stones. Still unsure about home sharpening? Start with the most common knife-sharpening misconceptions.
Original or Pro? Reviewers tested the Original. Want interchangeable discs or a ceramic honing disc? Read our Tumbler Original vs Pro breakdown before you choose.
When isn't Tumbler the right tool?
Tumbler isn't the right tool for serrated knives, ceramic knives or scissors, and it won't bring a chipped, long-neglected knife back in one quick session. If you already sharpen freehand on whetstones and enjoy it, you don't need one. Single-bevel Japanese knives need a different approach, so check the FAQ or contact support first.
FAQ
Is the Tumbler knife sharpener any good?
Most independent reviewers say yes. Taste of Home called the process "foolproof," GearJunkie scored it 7.9 out of 10, and Prudent Reviews measured a best edge of 198, inside its sharp range. America's Test Kitchen rated the Tumbler Original "Not Recommended."
Is the Tumbler knife sharpener worth the price?
Several reviewers flagged the price. You buy it once: the product pages list a lifetime warranty, Tumbler's FAQ says the diamond wheel doesn't need replacing if used properly, and returns run 30 days.
Why did America's Test Kitchen not recommend the Tumbler?
ATK found that the Tumbler Original's "abrasive cylinder was too low to reach and sharpen the full length of our knife edge," and results on a second knife were "poor and uneven." It tested the Original, not the Pro.
Have reviewers tested the Tumbler Pro?
Not a major outlet yet. As of October 2026, every major review that names a model tested the Tumbler Original; one barbecue shop's blog reviewed a Pro sample. The Pro adds a 4-layer diamond disc, an EdgeBoost ceramic honing disc and interchangeable discs.
How long does the Tumbler take to sharpen a knife?
It depends on how dull the knife is and when it was last sharpened. A dull or neglected knife takes about 2 to 12 minutes, and once you sharpen regularly, a touch-up takes about 60 seconds. A long-neglected knife may need more than one session.
Can the Tumbler sharpen serrated knives or scissors?
No to both. The Tumbler FAQ says the roller "is not suitable for serrations," and Tumbler can't sharpen scissors. Ceramic knives won't hold on the magnetic angle block either.
Sources
- Taste of Home, Allison T.S. Robicelli, Tumbler knife sharpener review, updated Sept. 8, 2026: https://www.tasteofhome.com/article/tumbler-knife-sharpener/
- The Kitchn, Micki Wagner, Tumbler Original review, updated Aug. 3, 2026: https://www.thekitchn.com/tumbler-diamond-rolling-knife-sharpener-review-23610686
- Prudent Reviews, Andrew Palermo, rolling sharpener BESS test, updated June 15, 2026: https://prudentreviews.com/horl-2-vs-tumbler-vs-work-sharp/
- Outdoor Life, Drew Conover, rolling knife sharpeners tested, updated Mar. 4, 2026: https://www.outdoorlife.com/gear/best-rolling-knife-sharpeners/
- America's Test Kitchen, manual knife sharpener reviews, updated July 9, 2025: https://www.americastestkitchen.com/equipment_reviews/1608-the-best-manual-knife-sharpeners
- The Gadgeteer, Lex Strickland, Tumbler Original review (sample provided by Tumbler), Jan. 29, 2025: https://the-gadgeteer.com/2025/01/29/tumbler-original-rolling-knife-sharpener-review-are-diamonds-a-knifes-best-friend/
- The Quality Edit, Joe Niehaus, Tumbler knife sharpener review, updated Jan. 16, 2025: https://www.thequalityedit.com/articles/tumbler-knife-sharpener-review
- NBC Select, Cory Fernandez, Tumbler knife sharpener review, updated Dec. 6, 2024: https://www.nbcnews.com/select/shopping/tumbler-knife-sharpener-review-rcna173496
- Forbes, David Hochman, sharpening knives at home, Nov. 20, 2024: https://www.forbes.com/sites/davidhochman/2024/11/20/sharpening-knives-at-home-a-better-way-to-keep-your-blades-in-shape/
- GearJunkie, Nick LeFort, "Gimmick or Godsend? 'Tumbler' Rolling Knife Sharpener Review," July 25, 2024: https://gearjunkie.com/knives/tumbler-knife-sharpener-review
- Pro Tool Reviews, Kenny Koehler, Tumbler rolling knife sharpener review, Apr. 9, 2024: https://www.protoolreviews.com/tumbler-rolling-knife-sharpener-review/
- Bartlow's BBQ, Tumbler Pro review (sample provided by Tumbler), Mar. 14, 2025: https://bartlowsbbq.com/blogs/product-reviews/tumbler-rolling-sharpener%E2%84%A2-pro-review-the-ultimate-knife-sharpener-for-precision-and-performance
- BladeForums, "Tumblerware sharpener - too gimmicky?", Dec. 2, 2022: https://www.bladeforums.com/threads/tumblerware-sharpener-too-gimmicky.1902906/
- Tumbler, Frequently Asked Questions (linked above)
- Tumbler, Compare Tumbler Rolling Knife Sharpeners (linked above)
Written by Team Tumbler. We make the Tumbler Rolling Knife Sharpener, so this roundup quotes independent reviews, including critical ones, and notes which model each reviewer tested.