[Material Aluminum Alloy Material] The keys are made of light aluminum alloy material, weight: 195g. Global heat treatment, good tenacity, high torque, strong tightening property. [Design design of precision turbine] The precision turbine cursor is closely adapted to the endless screw. The shift is flexible and rapid, the torque is strong, the tenacity is good, the adjustment opening is stable, the shift is easy to adjust quickly and the work efficiency is improved. [Drivest key widely used ] Our keys are suitable for tightening or loosening nuts and bolts, pipes and tube nuts to remove plumbing sanitary devices, sinks or the gas industry. Not suitable for use on heavy metal. [Adjustable key size] This solid but light aluminum key has adjustable machines that open between 9 and 70 mm. Large machine and a short handle make it perfect for tightening the counter-cracker on a basin. [short ultra-light stem] has a very low design, with an 8 inch length allowing it to access Easily with