Ck t4560 blue steel impact screwdriver pozidriv bits ck tools t4560 pz2ld10 these blue steel impact screwdriver bits from ck are manufactured from specially formulated v8 steel alloy for extreme toughness and are suitable for use with pozidriv screws ck tools t4560 pz2ld10 blue steel impact screwdriver bit 50mm pz2 box of 10