Features:- Each edge is a part of the characteristics of the cutting work, making the hole is not easyto produce the appearance of collapse- The stainless steel plate, steel, casting, Aluminum Alloy, iron and other kinds of metal plate drilling- Chip removal, with excellent performance, acute edge, wear-resistantDescription:Three groups of edge, each blade in cutting process is responsible for 1 / 3 ofthe workload, and inside each edge also has a cutting edge, also due to the edge,respectively, the burden of the characteristics of part of the cutting work, making thedrill hole is not easy to produce the appearance of edge collapse.Specifition:- Material:alloy- Color:silver- Length:65-70mm- Outside diameter Size: 16mm, 18mm, 20mm, 22mm, 25mm,26mm,28mm, 30mm, 35mm, 40mm,45mm, 50mm, 53mm- Chuck size:10mm- Application: Can be used for bench drill, electric drill chuck with the use of machine toolsNotice:This product is not easy to cut a relatively thin metal material, can be cutting within the 2-5mmstainless steel plate and the metal plate 15mmPackage includes:13 x Drill Bit Holes.