These Mittler Brothers punch and flare tool sets are designed to give your sheet metal a unique, clean look. Just drill a pilot hole for the draw bolt and then apply the tool and tighten the bolt for a smooth, flared hole in one easy step. They can also be used as a hole punch, simply by using the punch and die. The sets can be used on aluminum material with a thickness of 0.040 in. to 0.062 in., mild steel with a thickness of 0.040 in. to 0.062 in., and stainless steel with a 0.040 in. thickness. 6 lbs (2.5Kg) shipping weight.