The Milwaukee Hand Tools Metal Aviation Snips are made from forged alloy steel (Cr steel) that is chrome plated for increased lifetime. Extra hardened to 65 HRC. Serrated cutting edges prevent slippage when cutting. Compound leverage action, the torsion spring opens jaws automatically during cutting for faster cutting action and less fatigue work. The handles feature ergonomic and durable overmoulded grips with thumb and forefinger slots for increased comfort and less fatigue. These allow the user to push through sheet metal with ease with less risk of cutting oneself. Flush slimline design with a one-hand locking mechanism. Triple cutting direction identification: on the head, handle and by colour coded handle. Specification: Max. Cutting Capacity: Aluminium 1.0mm; Stainless Steel 0.6mm; Steel 1.0mm