The Milwaukee 48224512 metal snips left offset have thumb and forefinger slots for increased comfort and less fatigue and allows the user to push through sheet metal with ease with less risk of cutting oneself. The serrated cutting edges prevent slippage when cutting and prevents less hand fatigue when cutting thicker materials as it is design with compond leverage action. The torsion spring opens jaws automatically during cutting for faster cutting action and less fatigue work. It is chrome plated and the rust protected forged blades for increased lifetime. Extra hardened to 65 HRC. They are made from forged alloy steel for best durability – Cr Steel and have a one hand locking mechanism.