Cr-V ALLOY STEEL – Made from high-strength chrome vanadium alloy steel for excellent durability, wear resistance, and long service life.        
COLD FORGING & HEAT TREATMENT - Cold forging and heat treatment greatly improve the performance of the socket with enhanced hardness, increased wear-resistance and lifespan.
6-POINT SOCKET OPENING - 6-point design provides an exact and snug fit, allowing it to apply more torque on the fasteners and avoid slipping off.        
RADIUS CORNER DESIGN - The lifespan of both the fastener and socket will be greatly prolonged with the torque distributed to the inner wall.        
HIGH IMPACT RESISTANCE - Built to withstand heavy torque from impact wrenches and hand tools without cracking or deformation.