Bit type
Mandrels and sanding bands for nail drills
What a mandrel and sanding band are, the 3/32-inch mandrel KUPA lists, and how replaceable bands differ from solid carbide or diamond bits.
Also listed as sanding band, mandrel bit, sanding bands
Short answer
A mandrel is a plain metal shaft that holds a replaceable sanding band; when the band wears, you change the band instead of the bit. KUPA's comprehensive e-file bit kit lists a 3/32-inch mandrel with sanding bands.
Key facts
- Head shape
- Sanding band on a mandrel[1]
- Shank
- 3/32 inch (KUPA mandrel)[1]
- Grits or cuts
- Not confirmedWe verified no band grit range.
- Maker examples
- KUPA comprehensive e-file bit kit (mandrel with sanding bands)[1]The kit was sold out on 2026-10-07.
- Fit caveats
- Not confirmedWe verified no band sizes; buy bands sold for your mandrel.
Watch out for
- The mandrel is the part that fits the drill. KUPA's is 3/32 inch; check your handpiece's stated shank.
- Band sizes are not confirmed here. Buy bands sold for your mandrel rather than guessing the diameter.
Solid bits are graded once at the factory; a band can be swapped for a different grit on the same mandrel. See bit shapes and grits.
Questions
Do sanding band mandrels fit a standard nail drill?
KUPA lists a 3/32-inch mandrel with sanding bands in its comprehensive bit kit. Check that your handpiece takes 3/32-inch bits, and buy bands made for that mandrel.[1]