PROXXON 28255 diamond twist drill
Proxxon 28255 is a diamond twist drill with a documented 2.35 mm shank.
How to choose
Compare it for the maker’s documented hole-cleaning uses in small stone pieces. Verify the working diameter separately because the shank determines which holder fits.
Compatibility and limits
Diamond twist drill model 28255 · 2.35-mm shank
Questions before buying
Can I use the Proxxon diamond twist drill in place of a brad-point bit?
The 28255 is documented for tasks such as cleaning small holes in suitable stone materials. For a centered start in wood, compare the brad-point geometry of the 28876.