Reed's STP710 is a Stud Punch. It has a 1-11/32" capacity. It weighs 6.6 lbs. This stud punch is desined for use with metal studs, plumbing, and electrical work. It has the capability to punch 20 gauge steel and thinner steel. This model features 2 cutting edges, and is designed for use with the GR1.3 plastic grommets to protet pipe and wire from the metal edges.