Sealey HSS Cobalt Fully Ground Drill Bit Assortment 170pc Ø1 DBS170CBFully ground HSS Cobalt drill bits manufactured to DIN 338. 5% Cobalt gives increased heat hardness which helps extend the life of the drill bit. 135 Split point is self centring which helps to reduce thrust and aids an easier penetration. Efficient clog free swarf clearance. Suitable for drilling high carbon steel and stainless steel. Supplied in tough composite storage case. Specifications Detail Fully ground HSS Cobalt drill bits manufactured to