Stop wasting time changing tools use one tool for multiple operations. One tool does the work of many so you can eliminate costly tool changing cycle time. It s just what you need for chamfering, engraving, grooving and spotting. Each durable carbide insert has multiple indexes and is TiN coated to improve accuracy and prolong tool life. Use with carbon steel, alloy steel, stainless steel, non-ferrous metals, cast iron and high temperature alloys. Set includes center drill, up to 6 all-purpose coated inserts and a wrench. Includes: (1) center drill. (Up to 6) All-purpose coated inserts. (1) Wrench.