Fully ground HSS Cobalt drill bit 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. Drills can be resharpened without affecting their performance. Available as a 19pc, 25pc or 170pc set or in packs of individual sizes. High-density case for safe storage.