The Capri Tools bit sockets are made for the most demanding professionals. Each of our bit sockets is made from custom forged steel that underwent a proprietary heat treatment process and precisely machined to perform in toughest situations. Premium S2 steel forged bits are exceptionally strong and durable. They withstand high torque and do not twist protecting both the bit and the fastener. All bits feature chamfered end to ensure a smooth fit onto fasteners. The sockets are constructed with premium Chrome Vanadium steel and plated with our own chrome protected plating. They are durable and resist corrosion. Meets and exceeds ASME B107.110 standards. Single 3/8 in. drive T50 star bit socket.