Silverline Screwdriver Socket Set 1/4" Drive 10pce 10pce Hardened and tempered screwdriver bits with satin finish, mounted in polished chrome vanadium square drive socket Contents: slotted 4.5, 5.5 and 6.5mm; Phillips No.1, No.2 and No.3; PZD No.1, No.2, No.3 and No.4.