The SP-1 swivel head hand-held rivet tool features a patented positive-ratchet lockingfeature which will allow the swivel head section of the tool to turn 360?? and hold inplace in any of the forty-plus positions. The high-strength steel body and cast aluminumhead complement this new design in a swivel head riveting tool. The SP-1 also includesbuilt-in threaded nosepiece storage holes, a service wrench, and newly added rivet size hole gauge built into the handle. The SP-2 sets up to3/16″ steel rivets.