The Makita D-54097 HSS-R Bit, 25 Piece, Set is suitable for drilling applications in steel and cast-steel alloyed and unalloyed up to 900N/mm² tensile strength. Other materials include: grey cast, malleable cast iron, die-cast metal, iron sinter, nickel-silver, graphite cast iron, short chipping aluminium alloys, bronze, brass and hard plastics. Conforms to DIN 338 Standards. Specifications: Sizes: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5 & 13mm.