Our metal hand punch tool works on steel, aluminum and brass up to 16 gauge and has a 5/8-inch jaw opening. It comes with six sizes of punch and die sets, and by using the adjustable work stop, you can form holes up to 3.25 inches inward from the edge. Shop at Eastwood for metal cutting tools designed by DIY experts with a 100% customer satisfaction guarantee. Works with up to 16 gauge steel aluminum and brass Punches between 1/8 inch to 7/16 Inch 3.25 Inch throat depth with 5/8 Inch jaw opening Specifications: 1.2 Ton Max. Pressure 3.25” Throat Depth 5/8” Jaw Opening Mild Steel Maximum Material Thickness: 1/8” up to 16 gauge, 3/16” and ¼” up to 18 Gauge, 5/16 and 3/8” up to 20 Gauge, 7/16” up to 22 Gauge Contents: Hand Punch with installed adjustable Work Stop 1/8 Inch Punch and Die 3/16 Inch Punch and Die 1/4 Inch Punch and Die 5/16 Inch Punch and Die 3/8 Inch Punch and Die 7/16 Inch Punch and Die Key