Highly efficient HSS-R drill bits suitable for drilling applications in steel and cast-steel alloyed and unalloyed up to 900N/mm tensile strength, grey cast,malleable cast iron, die-cast metal, iron sinter, nickel-silver, graphite cast iron, short chipping aluminium alloys, bronze, brass and hard plastics. HSS-R 25pcs metal box setsizes included : 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 Makita 17pc Drill and Bit Set - D-45858 Set Contents: 25mm bits - PH2, PH3 25mm bits - PZ2, PZ3 25mm bits - S0.8, S1.2 25mm bits - T20, T25 Magnetic Bit Holder Masonry Drill Bits - 5, 5.5, 6, 7mm Wood/Metal Drill Bits - 4, 5, 6, 8mm.