Hand Held Power Punch, Sheet Metal Hole Punch Kit Durable power punch tool for punching accurate round holes through all types of materials From thin brass metal to plastic sheet through 16 gauge mild steel. Package comes with seven quick-change, durable heat treated punch-and-die sets. Sizes from 3/32, 1/8, 5/32, 3/16, 7/32, 1/4 and 9/32". Punch opens up to 1/4"; throat depth: 1-3/4" Set completes with a durable plastic storage case