Bosch 2607019578 18 Piece HSS-G Metal Drill Bit Set in Tough Box  The Bosch 2607019578 is an 18 Piece HSS-G metal drill bit set that comes in a tough box. It is suitable for alloyed and non-alloyed steel up to a tensile strength of 900 N/mm_, cast steel, cast iron, sintered iron, malleable cast iron, non-ferrous metals, hard plastics. Precision-ground HSS-G drill bit enables up to 40% faster drilling rate and up to 50% lower feed pressure than standard-ground HSS drill bits with a chisel edge.  Features:   In tough plastic box   Self-centring split point drill tip  There is no need to pre-punch or pilot drill up to 10mm in diameter  Specification:  Diameter mm: 1, 1.5, 2x2, 2.5, 2x3, 3.5, 2x4, 4.5, 5, 5.5, 6, 7, 8, 9, 10  Working length: 12, 18, 2x24, 30, 2x33, 39, 2x43, 47, 52, 2x57, 69, 75, 81, 87  Total length: 34, 40, 2x49, 57, 2x61, 70, 2x75, 80, 86, 2x93, 109, 117, 125, 133