?Material Aluminum alloy material? The keys are made of lightweight aluminum alloy material, weight: 195g. Overall heat treatment, good toughness, high torque, strong clamping property. The precision turbine slider is closely matched with the auger. The slip is flexible and fast, the torque is strong, the toughness is good, the adjustment opening is stable, the slip is easy to adjust quickly, and the work efficiency is improved. Widely used adjustable wrench? Our wrenches are suitable for tightening or loosening nuts and bolts, pipe and tube nuts for removing plumbing fixtures, sinks or gas industry. Not suitable for use on heavy metal. Adjustable spanner size This strong yet lightweight aluminum spanner has adjustable jaws that open between 9-70mm. Wide jaws and a short handle make it perfect for tightening the lock nut on a basin. Features a super low profile design, 8 inch length allowing it to easily access tight spaces, non-slip handle to save your joints while working.