Premium quality S2 alloy steel for exceptional strength & durability. Precision machined tip for an exact fit & damage free screwdriving. Set contained in a convenient bit storage clip complete with bit holder. Bit sizes: PZ1 x 1, PZ2 x 4, PZ3 x 1. TX10 x 2, TX15 x 4, TX20 x 4, TX25 x 2, TX30 x 2, TX 40 x 1. PH1 x 1, PH2 x 2. SL4.0 x 1, SL5.5 x 1, SL6.5 x1. Hex4 x 1, Hex5 x 1, Hex6 x 1. .