The Bosch Robust Line 6 Piece HSS-TiN Drill Bit Set is a professional metal drilling set, offering six titanium-nitride coated HSS twist drill bits engineered for extended working life and precise performance. The TiN coating significantly reduces friction and wear during use, particularly when a suitable cooling agent is applied. Each bit is ground from high-speed steel (HSS) to a high surface quality, supporting consistent, accurate drilling across a range of materials including alloyed and non-alloyed steel, malleable cast iron, sintered iron, new silver, copper, bronze, and hard plastics such as Perspex. Manufactured to DIN 338 and conforming to Type N flute geometry, each drill bit features a 135-degree pointed split-point tip that promotes active cutting and precise centring without wandering. The h8 diameter tolerance ensures accuracy, and the cylindrical shank design is compatible with standard three-jaw drill chucks. This set is suitable for use in drill stands and drill drivers. Note: these bits are not suitable for use on aluminium, and a cooling agent must be used during drilling. The set covers six diameters from 2mm to 8mm, making it a practical choice for contractors and metalworkers requiring a versatile range of HSS drill bits for everyday workshop or on-site use. Features and Benefits: • TiN coating minimises friction and wear for maximum drill bit longevity • Ground HSS construction delivers high surface quality and extended usage life • 135-degree split-point tip ensures accurate centring and active cutting without wandering • Manufactured to DIN 338, Type N, with h8 diameter tolerance for precision drilling • Cylindrical shank compatible with standard three-jaw drill chucks • Suitable for steel, cast iron, copper, bronze, new silver, sintered iron, and hard plastics • Six-piece set covering 2mm, 3mm, 4mm, 5mm, 6mm, and 8mm diameters Specifications: Net weight: 0.177 kg Diameters: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm Working lengths: 24mm, 33mm, 43mm, 52mm, 57mm, 75mm Tip angle: 135° Diameter tolerance: h8 Standard: DIN 338, Type N Contents: Robust Line HSS-TiN 135° metal drill bit set (156.5 x 69.5 x 23mm), 6 pieces Included diameters: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm Included working lengths: 24mm, 33mm, 43mm, 52mm, 57mm, 75mm