The metabo hss r drill bit set is suitable for drilling in steel non ferrous metals alloyed non alloyed and cast steel up to 900 nmm tensile strength the bits are roll milled with cylindrical type n 118 cone shape tips and have a shell polished surface supplied in a metal tin and contains one of each size 1 15 2 25 3 35 4 45 5 55 6 65 7 75 8 85 9 95 10 105 11 115 12 125 13mm