Chamfering is the best alternative to traditional bore chamfer, chamfer milling mold shape, characterized by high precisionand low roughness of the machined surface, strong applicability widely used for high and low level of each class processing equipment.PurposeShen hole for aluminum, iron, PV panels and other soft materials, inverted taper. During use, you can better chipfive cutting edge, the cutting edge is not volatile blunt colour: Bit roasted yellowMaterial:HSS 4341Size:1/4 inch; 3/8 inch; 1/2 inch; 5/8 inch; 3/4 inch: 6mm, overall length: approx 60mmPackage Contents:5 * 82Deburring Bits1 * aluminum boxOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.