Fully ground process and 135 split point & nbsp; Fully crushed spiral groove design clears particles quickly, decreases friction and heat for faster and cooler drilling performance. 135 point split with a straight shank prevents walking and makes drilling easier.No center punch is needed. & nbsp; Quick change & nbsp; Hex Shank Fits Majority Pistol Drill and Drill Press, more easily and securely with no slip and loss. 100% new high quality. Made of steel, good workmanship, high precision. Anti-impact and hard, very resistant to wear. Color: Black Material: metal Hardness: HRC60 Size: 21 * 12 mm Magnetism: big magnetism Explosion proof: no Insulation: No Screw head: General purpose System: metric Include: 1 x magnetism ring