Ck screwdriver bit sets ck tools t4583c premium quality chrome vanadium steel precision machined for high performance screwdriving featuring grip tip anti cam out ribs designed to positively engage with the screw head and reduce the risk of slip and cam out set supplied in a convenient bit storage case complete with magnetic bit holderdriver adaptor bit sizes slotted 55 amp 65mm pzd 1 amp 2 ph 1 amp 2 ck tools t4583c screwdriver bit 6in1 bit mixed