Bit type

Barrel nail drill bits: small and large, grits and fit

What a barrel nail drill bit is, the small and large sizes, the grits KUPA sells, the 3/32-inch fit statement and the shank catch to check.

Also listed as small barrel bit, large barrel bit, barrel nail drill bit

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Short answer

A barrel bit has a straight, cylindrical head, made in small and large sizes. KUPA sells a diamond small barrel in fine, medium and coarse and says it fits any 3/32-inch e-file handpiece. Some barrels have a smooth top: see the safety bit.

Key facts

Head shape
Straight cylinder (barrel), small or large[1]
Material
Diamond (KUPA small barrel)[1]Barrels are also sold in carbide; check the material on the bit maker's page.
Shank
3/32 inch (KUPA)[1]KUPA says its diamond small barrel fits any 3/32-inch e-file handpiece.
Grits or cuts
Fine, medium, coarse (KUPA diamond small barrel)[1]
Maker examples
KUPA diamond small barrel[1]
Fit caveats
KUPA's fit statement covers 3/32-inch handpieces, not chucks labeled 2.35 mm[1]

Watch out for

  • Small and large are the maker's sizes. There is no shared standard, so compare the head dimensions on the bit maker's page.
  • 3/32 inch, not 2.35 mm. KUPA's fit statement covers 3/32-inch handpieces only.
  • Prop 65 notice. KUPA's diamond small barrel page carries a California Proposition 65 warning.

What fits

Product details below are the seller's own description unless a source is shown. Pick the variant named for each item.

See all shapes in nail drill bit shapes and grits.

Questions

What is the difference between a small and a large barrel bit?

Head size. Both are straight cylinders; makers name the sizes themselves, so check the head dimensions on the maker's page. KUPA, for example, sells a diamond small barrel in fine, medium and coarse.[1]

Sources

  1. Diamond Small Barrel (Coarse) · Kupa Inc · KUPA diamond small barrel bit: 3/32 fit statement, grits, Prop 65 notice. · checked 2026-10-07
  2. FAQs - MelodySusie · MelodySusie · MelodySusie FAQ: bit size, drill features, power supply, warranty, lamp wavelength bands. · checked 2026-10-07

Next review due 2027-01-07.