Made for the most demanding professionals, each of our bit sockets is made from custom forged premium steel that underwent proprietary heat treatment and precisely machined to perform in toughest situations Premium S2 steel forged bits are exceptionally strong and durable. These S2 steel bits withstand high torque and do not twist, protecting both the bit and the fastener Chamfered end to ensure a smooth fit onto fasteners Premium chrome vanadium steel sockets plated with our SmartKrome Protective plating are durable and corrosion resistant Single 1/4 in. Drive, Long 3/16 in. Hex bit socket (3-1/16 in. Long bit), Weight: 0.0440924524 pounds, Manufacturer: Capri Tools