Features Made of M35 material including cobalt, having high hardness, stable performance. 135-degree split-point tip starts drilling immediately with less force and eliminates Ideal for drilling on stainless steel, cast iron, sheet metal, steel plate, Angle iron. With high finish, high grinding , the blade is durable in use. It is widely used in the drilling of stainless steel plates, automobile spring steel and die steel Specification: Material: HSS CO/M35 Size:1MM x 10pcs,1.5MM x 10pcs, 2MMx10pcs, 2.5MM x10pcs    3MMx5pcs,3.2MM x5 pcs, 3.5MM x5 pcs, 4MMx5 pcs, 5MMx5 pcs, 6MMx5 pcs , 7MMx2 pcs, 8MMx2 pcs Weight: 348 g / 12.3 oz(approx.)   Package list: 74 x M35 Cobalt Drill Bit       Package List