The Screwdriver belt clip bit of PZD/PH set is made from premium quality chrome vanadium steel. Designed for high performance screw-driving. This bit set features grip tip where the head bites into the screw to resist damage to the screw and screwdriver (cam out). The kit comes with convenient storage clips to store the screw heads not used and comes with a magnetic bit holder/driver adapter. Bit sizes included: PH: 0, 1, 2, 3 PZD 0, 1, 2, 3 Main Features: Chrome Vanadium Steel Construction Phillips Head & PoziDrive set Guaranteed For Life 8Pc Set With Holder Clip Technical Specification: Weight: 56g Construction: Chrome Vanadium Steel Qty: 8 In Pack Specification Sheet. Lifetime Guarantee Included