C k bit set 100mm mixed set of 10 ck tools t4525 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 contained in a convenient bit storage clip bit sizes slotted 4 5 7mm ph1 2 3 pz1 2 3 tx15 20ck tools t4525 bit set 100mm mixed set of 10