The Tumbler Pro disc system is the set of swappable discs on the Pro version of the Tumbler Rolling Knife Sharpener. It ships with a 4-layer diamond disc for sharpening and an EdgeBoost ceramic disc for honing. Add-ons: the Coarse Diamond Disc #150 repairs chips; the 3000/6000 Whetstone Disc Set smooths and polishes. The Tumbler Original's discs are fixed.
Key Takeaways
- In the box: a 4-layer diamond disc (sharpening) and an EdgeBoost ceramic disc (honing).
- Sold separately: the Tumbler Coarse Diamond Disc #150 (repair) and the Tumbler Pro Whetstone Disc Set (3000/6000, smoothing and polishing).
- Order: #150 only for damage, then the standard diamond disc, then EdgeBoost, about 6 passes per side. Whetstone discs go after the diamond disc.
- 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.
- The Tumbler Pro's discs are interchangeable; the Tumbler Original's are not.
New to rolling sharpeners? Start with our rolling sharpener basics.
What does each Tumbler Pro disc do?
Each disc has one job: the Coarse Diamond Disc #150 repairs damage, the standard diamond disc sharpens, the 3000 and 6000 whetstone discs smooth and polish, and the EdgeBoost ceramic disc hones away the burr. Two come in the box. The other three are add-ons.
| Disc | Abrasive / grit | Job | Use it when | In the box or add-on | Fits |
|---|---|---|---|---|---|
| Coarse Diamond Disc #150 | Diamond, #150 | Repair | The edge is chipped, dented or badly dulled | Add-on | Pro bought after June 1, 2025* |
| Standard 4-layer diamond disc | Diamonds, nickel and stainless steel (no grit listed) | Everyday sharpening | The knife is dull, not damaged | In the box | Every Tumbler Pro |
| 3000 whetstone disc | Whetstone, 3000 grit | Smoothing | After the diamond disc | Add-on; also in the Pro Starter Set | Pro bought after June 1, 2025* |
| 6000 whetstone disc | Whetstone, 6000 grit | Polishing | After the 3000 disc | Add-on; also in the Pro Starter Set | Pro bought after June 1, 2025* |
| EdgeBoost ceramic disc | Ceramic (coarser surface than steel) | Honing: removes the burr | After every sharpening, about 6 passes per side | In the box | Every Tumbler Pro |
| Tumbler Original (for comparison) | Fixed diamond disc + EdgeBoost steel honing disc | Sharpening and honing | Everyday knives | Built in, not interchangeable | Add-on discs don't fit |
*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.
What discs come with the Tumbler Pro?
The Tumbler Pro comes with two removable discs: a 4-layer diamond disc for sharpening and an EdgeBoost ceramic disc for honing. The Pro can swap in add-on discs. The Tumbler Original has a diamond disc and an EdgeBoost steel honing disc, and neither one comes off.
The Tumbler Pro product page describes the diamond disc as "four durable layers, including genuine diamonds, nickel, and stainless steel."
That clears up a common review con. Outdoor Life, testing the Tumbler Original, lists "Discs not replaceable." Prudent Reviews writes that "you can't change or replace the Tumbler's discs"; it doesn't name the model, but the fixed discs it describes are the Original's. Compare the Tumbler Original and Tumbler Pro or see our roundup of what reviewers say about Tumbler.
What does the Coarse Diamond Disc #150 do?
The Tumbler Coarse Diamond Disc #150 is the repair disc. It's built for chips, dents and badly dulled edges, and it removes more steel per pass than the standard diamond disc. Use it first, then switch back to the standard diamond disc to sharpen. It's the right tool for heavy repair, not an everyday disc.
Tumbler's Coarse Diamond Disc #150 page says it's "designed to fix chips, dents, and edges that seem beyond saving." More in our guide to fixing a chipped knife.
The #150 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.
What do the 3000 and 6000 whetstone discs add?
The Tumbler Pro Whetstone Disc Set adds two finishing discs: 3000 grit for smoothing and 6000 grit for polishing. Tumbler says they work "after the diamond disc," so they refine an edge that's already sharp rather than sharpen a dull one. They suit Japanese knives and any cook who wants a finer finish. Weighing these discs against a traditional bench stone? Our guide to choosing between a rolling sharpener and a whetstone shows where the real difference lies: who holds the angle.
The Tumbler Pro Whetstone Disc Set is "designed to be used dry." For scale, a JIS 3000 stone is roughly 5 microns versus about 16 for a 1000, per Lee Valley's grit charts, which warn that "the scales diverge at different rates as the grits get finer." Our knife sharpening grit chart goes deeper.
The set 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.
What is the EdgeBoost ceramic disc?
EdgeBoost is the honing disc on both Tumbler models: steel on the Original, ceramic on the Pro. Honing is the final step, a few light passes that remove the burr sharpening leaves behind. The Pro's ceramic disc has a coarser surface than the Original's steel disc. About 6 passes per side is plenty on either one.
Tumbler's sharpening instructions say to hone "ON BOTH SIDES OF THE BLADE to remove any burr," then check with a fingernail. Our guide to honing vs sharpening explains the difference; our comparison of diamond, whetstone and ceramic abrasives covers the materials.
In what order do you use the discs?
Use only the discs the knife needs. Repair with the #150 if the edge is chipped or dented, sharpen on the standard diamond disc, then hone on EdgeBoost. For a finer finish, the whetstone discs go after the diamond disc: 3000 first, then 6000.
- Chipped, dented or badly neglected: the Coarse #150, then the standard diamond disc.
- Dull but undamaged: the standard diamond disc.
- Sharp, but you want a finer finish: 3000, then 6000.
- After every sharpening: EdgeBoost, about 6 passes per side.
Tumbler's pages don't say whether to hone before or after the whetstones; follow any instructions packed with them or ask Tumbler support. On every disc, roll the full edge (our guide to sharpening the heel and tip shows how).
Will the add-on discs fit my Tumbler?
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. Earlier Tumbler Pros can't take them either. Not sure which version you have? Ask Tumbler support before you buy.
How do the discs relate to the angle holders?
Discs change the abrasive; holders change the angle. The standard holder in the Tumbler Original and Tumbler Pro boxes has two sides, 15° and 20°. The Tumbler Knife Holder Pro has four sides, each with one fixed angle: 10°, 15°, 20° and 25°.
They meet when you change angles: "Lowering an angle (for example, from 20° to 15°) requires removing more steel," says the #150's page. That's a job for the #150 on a Tumbler Pro bought after June 1, 2025. For picking an angle, see which sharpening angle is right for your kitchen knife.
When isn't the Pro disc system the answer?
Add-on discs don't change which blades a rolling sharpener suits. Serrated and ceramic knives aren't supported, Tumbler can't sharpen scissors, and single-bevel knives need a different approach. Plenty of cooks with Western knives in good shape never need an add-on disc, or the Pro (see our Tumbler Original vs Pro guide).
- Serrated knives: "The Tumbler roller grinder is not suitable for serrations," says the Tumbler FAQ.
- Ceramic knives: "Ceramic is not magnetic," so they won't stay on the holder.
- Single-bevel knives: check the FAQ or ask Tumbler support first; see our guide to rolling sharpeners and Japanese knives.
FAQ
Can I use the whetstone or coarse discs on the Tumbler Original?
No. 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.
How do I know if my Tumbler Pro takes the add-on discs?
Look for a hex recess above the screw threads. Tumbler Pro models purchased after June 1, 2025 have it and take both add-ons.
Do I need the whetstone discs?
No. They're optional: 3000 smooths and 6000 polishes the edge after the diamond disc. Japanese knives benefit most. They fit only post-June 1, 2025 Tumbler Pro models, not the Original.
Do the Tumbler Pro discs wear out?
Tumbler's FAQ says that if the sharpener "is used properly, the diamond wheel does not need to be replaced," so use light pressure. Diamond "serves as the definition of 10 on the Mohs scale of mineral hardness." Tumbler doesn't publish a lifespan for the ceramic or whetstone discs.
Which disc should I use on a chipped knife?
Start with the Coarse Diamond Disc #150, switch back to the standard diamond disc to sharpen, then hone on EdgeBoost. The #150 fits only post-June 1, 2025 Tumbler Pro models, not the Tumbler Original.
Sources
- Tumbler, Tumbler Pro Diamond Rolling Knife Sharpener Set (linked above)
- Tumbler, Tumbler Pro Whetstone Disc Set (linked above)
- Tumbler, Tumbler Coarse Diamond Disc #150 (linked above)
- Tumbler, Compare Tumbler Rolling Knife Sharpeners (linked above)
- Tumbler, Sharpening Instructions (linked above)
- Tumbler, Frequently Asked Questions (linked above)
- Drew Conover, Outdoor Life, The Best Rolling Knife Sharpeners (updated March 4, 2026)
- Andrew Palermo, Prudent Reviews, rolling knife sharpener comparison (updated June 15, 2026)
- Wikipedia, Material properties of diamond
- Lee Valley, Grit charts
By Team Tumbler