These drill bits from Sealey are fully ground HSS cobalt drill bits manufactured to DIN 338. The 5% cobalt gives increased heat hardness which helps extend the life of the drill bit, while the 135° split point is self-centring, helping to reduce thrust and aids an easier penetration. Another feature is the efficient clog-free swarf clearance, while the bits can be re-sharpened without affecting its performance. Includes a high density case for safe storage. Available in individual sizes ranging from 1/4 to 7/32in.