STANLEY 11 PIECE METRIC COMBINATION WRENCH SET 7MM TO 17MM Chrome vanadium steel forging for durability and high torque Max-Drive design of the box end allows for 15% more torque and helps reduce fastener rounding 15-degree box end offset for additional knuckle clearance Full polish plating for anti-corrosion protection and easy cleaning Chrome vanadium steel forging for durability and high torque Max-Drive design of the box end allows for 15% more torque and helps reduce fastener rounding 15-degree box end offset for additional knuckle clearance