Malco SRC24A Channel Shear with Compound Leverage for Cutting 1-5/8-Inch 2-1/2-Inch and 3-5/8-Inch Steel Studs and Channel Cuts both Stud and Runner Sizes: 1 5/8", 2 1/2", and 3 5/8" inches ( 41, 64, and 92 mm.) Compound Leverage Stable Base Replaceable Blade, Malco Cat # 10627