Chamfered opening provides faster and easier socket fit over fastener Patented Allendrive for higher torque and less chance for fastener rounding Thin wall construction for better access to fasteners in limited areas Precision cold formed for exact, consistent dimensions and greater strength Nickel chrome finish provides lifetime corrosion resistance Ratchet 3/8-in drive sockets (2542-1512) Deep well 12 point 13/16-in Carded