Create holes in metal no matter where it is on the piece, you are not limited by the depth of a pliers reach. tt is rated for up to 18 gauge metal. The punches are 1.1mm for 18 gauge, 1.4mm for 16 gauge, 1.7mm for 14 gauge, 2.15mm for 12 gauge.
The opening is 4 inches (101.60mm) wide.
The punches are replaceable.