Brand New 13 Piece Professional HSS Drill Bits set - Sizes From 1.5mm - 6.5mm 'Professional' high speed steel (HSS) drill bits are manufactured from high quality M2 grade tool steel Each bit has a fully ground flute and cutting tip, featuring a 135 degree point angle and split point providing easy non-slip starting and precision drilling. All these great features help you to achieve superior performance in most materials. Suitable for use in: Alloy Steels, Carbon Steels, Cast Iron, Hardened Alloy Steels, Stainless Steels. Sizes: 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm