The 1/16" shank diamond bits do an amazing job of removing material where control is necessary. These FG (friction grip) diamond burrs are ideal in high speed engraving tools like the NSK Presto. Use these diamond bits for etching in glass, metal, bone, antler, wood, and virtually any other material. The diamond bits work a lot like sandpaper where the material is finely ground away rather than sliced away like the carbide bits.