Bosch Metal HSS Twist Drill Bits are made from high-speed steel for strength and resistance to heat and wear. The drill bits from 4mm in diameter feature a split-point PointTeQ tip which centres it, helping you drill accurately.Select Option 1.5 x 18 x 40mm (Pack of 2)10 x 87 x 133mm12 x 101 x 151mm13 x 101 x 151mm2 x 24 x 49mm (Pack of 2)2.5 x 30 x 57mm (Pack of 2)3 x 33 x 61mm (Pack of 2)3.5 x 39 x 70mm (Pack of 2)4 x 43 x 75mm (Pack of 2)4.5 x 47 x 80mm5 x 52 x 86mm5.5 x 57 x 93mm6 x 57 x 93mm7 x 69 x 109mm8 x 75 x 117mm Add to Basket Quantity