Engraving cutter. Quality cutters for detail engraving, carving and routing in wood, fiberglass, plastic and soft metals. Two cutters included.Use Tips Use higher speeds for hard woods, slower speeds for metals and very slow speeds for plastics (to avoid melting at the point of contact). Use the sides of the cutter (rather than the tip) for effective cutting. The tip cuts poorly and can break under pressure. For best results, insert the accessory bit all the way into the tool and then back it out slightly before tightening down. This provides plenty of shank for the collet or chuck to hold onto the bit. Secure objects to a stable surface while working. If chattering occurs, increase speed. Features Use higher speeds for hard woods, slower speeds for metals and very slow speeds for plastics For wood, fiberglass, plastic and soft materials 1/8 In. shank For detail engraving, carving and routing Not for use with hardened materials Bit Diameter: 3/32 in Shank Diameter: 1/8 in Overall Length: 1.5 in Material: High Speed Steel Color / Finish: Metal Country of Origin: Germany Material Compatibility: Wood, Fiberglass, Plastic, Soft Metals