1Each edge is a part of the characteristics of the cutting work, making the hole is not easy to produce the appearance of collapse. 2The stainless steel plate, steel, casting, Aluminum Alloy, iron and other kinds of metal plate drilling. 3Chip removal, with excellent performance, acute edge, wearresistant. 4Our carbide hard metal cutting hole cutter has a chip groove and deploying hole design, which can effectively remove chips and increase operating speed. 5The increased hardness of the carbide technology and optimized tooth geometry allow our hole saw to provide superior service life. Features:- Each edge is a part of the characteristics of the cutting work, making the hole is not easy to produce theappearanceof collapse - The stainless steel plate, steel, casting, Aluminum Alloy, iron and other kinds of metal plate drilling - Chip removal, with excellent performance,acuteedge, wear-resistant Description:Three groups of edge, each blade in cutting process is responsible for 1 / 3 of the 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 the drill hole is not easy to produce theappearanceof 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 2-5mm stainless steel plate and the metal plate 15mm Package includes: 13 x Drill Bit Holes