Proxxon diamond twist drills are precision tools for drilling in glass, ceramics, porcelain tile, and hard stone without cracking or chipping. The diamond coating provides aggressive cutting action while the twist geometry clears debris from the bore for clean, accurate holes in the most demanding materials. 

This set includes Ø 1/32" (0.8mm) and Ø 3/64" (1.2mm) in a 2-piece pack — the most common small diameters for precision work in glass, ceramic tile, and hard stone. Compatible with all MICROMOT steel collets for use with the IBS/A cordless drill/grinder and IBS/E. 

For best results: use the lowest RPM setting on the IBS/A, apply light consistent pressure, and keep the work piece wet if possible to extend bit life and prevent heat fracture.