| 1. Good material: These cutters are made of tungsten carbide steel for high hardness and abrasion resistance.^ 2. Function: The set of cutters can cut cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum, marble, jade, bone, etc.^ 3. Usage: Widely used for carving, shaping and removing sharp edges, burrs and excess material.Compatible with most rotary tools, This set of drill bits can be used for engraving, chamfering, grooving , bore, hollow, etc. The processing efficiency is ten times higher than the manual file tool, and almost ten times higher than the small grinding wheel with the handle.^ 4. Widely Fit: The 3mm round shank is suitable for many tools with … | |