Hss cobalt drill bit 3.0mm ol61mm wl33mm irwin 10502562, the irwin metric hss cobalt drill bits are perfect for drilling stainless steel and other high alloys'. '.strtoupper('t')heir 135deg split point grinding ensures perfect centring and reduced drilling pressure'. '.strtoupper('a')n industrial quality ground flute ensures high accuracy drilling and fast removal of chips'. '.strtoupper('t')he drill bit body is manufactured from high quality hss steel containing 5% cobalt co'. '.strtoupper('t')he added 5% cobalt improves the red hardness heat resistance of the drill bit and results in significantly extended life'. '.strtoupper('i')t has an attractive golden tempered surface finish.diameter 8.5mm.working length 75mm.overall length 117mm'. '.strtoupper('i')rwin® 10502562 hss cobalt drill bit 8.5mm ol117mm wl75mm