Countersink tools with 3 cutting edges.Suitable for countersink, chamfer, and peripheral milling operations.Coated or uncoated special carbide inserts with logarithmic blades.Perfect positioning = highest precision and repeatability.The same inserts are suitable for different applications.Each kit includes 1 tool and 6 TiN coated carbide inserts for steel, 3 screws and 1 wrench.