The Bosch PRO 13 Piece HSS-G Drill Bit Robust Set is a professional-grade metal drilling kit designed for tradespeople who need precise, reliable performance across a wide range of materials without the need for pilot holes. Ground from premium high-speed steel (HSS-G), these twist drill bits are built for long-lasting durability in demanding site conditions. The grinding process gives each bit strong resistance to wear and heat, ensuring consistent cutting performance over repeated use. The 135° split-point tip allows you to start holes exactly on your mark, making these bits particularly well suited to drilling in alloyed and unalloyed steel, non-ferrous metals, cast iron, plastics, and wood. The cylindrical shank ensures compatibility with standard three-jaw drill chucks. This 13-piece set covers a practical range of diameters from 1.5mm to 6.5mm, making it ideal for construction workers, installers, and contractors who require a versatile drill bit selection for everyday metalworking and fabrication tasks. Features and Benefits: • Lasts up to 2x longer than a Bosch PointTeQ Drill Bit for extended service life • HSS-G construction ground from solid steel for wear resistance and fast drilling progress • 135° split-point tip for precise hole starting with no pilot hole required • Cylindrical shank compatible with standard three-jaw drill chucks • 13-piece set covering diameters from 1.5mm to 6.5mm for versatile application Specifications: Net Weight: 0.215kg Diameters (mm): 1.5, 2, 2.5, 3, 3.2, 3.5, 4, 4.5, 4.8, 5, 5.5, 6, 6.5 Total Lengths (mm): 40, 49, 57, 61, 65, 70, 75, 80, 86, 86, 93, 93, 101 Working Lengths (mm): 18, 24, 30, 33, 36, 39, 43, 47, 52, 52, 57, 57, 63 Set Dimensions: 124 x 106.5 x 23mm Contents: 13-piece Robust Line HSS-G metal drill bit set with 135° split-point tip Diameters (mm): 1.5, 2, 2.5, 3, 3.2, 3.5, 4, 4.5, 4.8, 5, 5.5, 6, 6.5 Working Lengths (mm): 18, 24, 30, 33, 36, 39, 43, 47, 52, 52, 57, 57, 63