The double-ended ENP (Electroless nickel plated) bit load includes: Square 0,1, 2, 3; Philips 0,1,2,3; Flat (Slot) 4,6; Star (Torx) 10, 15, 20, 25. Shaft opening serves as a 1/4" Hex driver. The bits are Stainless Steel - Rust Resistant. Ideal for the outdoor and marine environments as well as recreational activities like camping, hiking, 4 wheeling and boating. Retractable cartridge and Palm-Saver Technology. The EZ Guide collar helps maintain full contact between the bit and the screw for easier screw driving.The Shaft is made of alloy steel while the handle is made from engineered Triax 1120 resin, an ABS-Nylon alloy.