Hardened and tempered steel shanks with hexagonal swivel heads. Includes: Phillips PH1-1, PH1-2, PH0 & PH0-2; slotted 1.0, 1.4, 2.0, 2.4, 3.0 & 3.8mm; hex 1.5, 2.0, and 2.5mm; and nut drivers 3.0, 4.0 & 5.0mm.