Drop Forged Chrome Vanadium Steel * Heat Treated and Triple Chrome Plated for Extra Durability * Tapered 6-Point or 12-Point Socket Ends for Easy Access to Nuts and Bolts * Featuring the Opti-drive System A Revolutionary Design That Allows You to: Apply Greater Torque without Damaging the Fastener or Socket; Distribute Stress Evenly on the Socket to Prolong its Life * Lifetime Guarantee