13 Piece Screwdriver Set Chrome vanadium steel for strength and durability. Hardened, magnetic tip. Ergonomic triangular shaped non-slip handles for better turning power. Set includes: #1, #2, #3 Phillips, 5/32″, 3/16″, 1/4″ Slotted, T-15 and T-20 Star-drive, and 3mm, 4mm, and 5mm hex key screwdriving bits.