The Sealey DBS170CB Hss Cobalt Fully Ground Drill Bit Assortment with efficient clog-free swarf clearance The Sealey DBS170CB is a 170 Piece HSS Cobalt Fully Ground Drill Bit Assortment, manufactured to DIN 338. This assortment of drill bits is suitable for drilling high carbon steel and stainless steel. The 135° split point is self-centring for easier penetration and 5% Cobalt helps to increase the life of the drill bit. Features: Efficient clog-free swarf clearance 5% Cobalt helps to increase life of drill bit Sizes from 1 to 10mm in 0.5mm increments 135° Split point is self-centring for easier penetration Suitable for drilling high carbon steel and stainless steel Fully ground HSS Cobalt drill bits manufactured to DIN 338 Comes with: 5 of each: 8.5, 9, 9.5, 10mm 10 of each: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8mm Specification: Model No: DBS170CB