Punch & Flare tool set of 8 sizes: 1"-1 1/4"-1 1/2"-1 3/4"-2"-2 1/2"-2 5/8"-3" diameter. Precision ground surfaces and cutting edges. These punch & flare tools can be used in three ways: Punch only-punch & flare-flare exisiting holes. No need to use holes saws any longer , get a uniform, burr free hole. Us the flare option to strengthen and/or lighten a panel. Capacity 16 gauge mild steel, (pre-punching hole for the larger diameter versus max. gauge thickness is recommended) Instructions & extra high tensile draw bolt included with each punch & flare tool. Can also be purchased individualy see MA0 series tools.