The DeWalt 10 Piece HSS-R Drill Bit Set is a precision ground black oxide twist drill bit set designed for fast, accurate drilling in a wide range of metals and ferrous materials. Constructed from non-alloyed high speed steel with a black oxide finish, these HSS-R bits deliver rapid material removal alongside extended corrosion resistance and long service life. The precision ground geometry ensures excellent concentricity, making them well suited to both portable drills and stationary pillar drill setups. The set covers materials up to 900N/mm², including steel, cast steel, alloyed and non-alloyed material, grey cast iron, spherical-graphite cast iron, sintered iron, nickel, and brass. This versatility makes the set a reliable everyday choice for metalworkers, engineers, fabricators, and general contractors working across a variety of substrates. Supplied in a convenient 1mm to 10mm range, the ten-bit progression covers the most commonly required sizes for general metal drilling tasks on site or in the workshop. Features and Benefits: • Precision ground HSS-R twist drill bits for accurate, concentric drilling • Black oxide finish provides extended corrosion resistance and longer service life • Suitable for materials up to 900N/mm², including steel, cast iron, brass, and nickel • Compatible with both portable and stationary drilling machines • Ten-piece set covering 1mm to 10mm in 1mm increments Contents: HSS-R Black Oxide Metal Drill Bits: 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm