0915 54PCS DRILL SET – 54 piece Straight Shank Drill set, HSS 1 mm to 13mm.Dormer 0915 series 54-pieces Drill Bit Set made from HSS for high-performance, offering more resistance than high carbon steel bits. It contains a great selection of the most commonly used metric & imperial diameters from 1mm to 13 mm in 0.5 mm increments and 1/16″ to 1/2″ in 1/64″ increments. These High-Speed Steel (HSS) drill bits are constructed from a single piece of high-speed steel, thus reducing breaking and blunting under heat or stress. Manufactured in accordance with DIN 328 for high precision tolerances and geometric accuracies. The set is supplied in a stylish metal case which fans out automatically when open.