The Marson SP-1 hand riveter features a patented positive-ratchet locking feature which will allow the swivel head section of the tool to turn 360 Degrees and hold in place in any of the forty plus positions. The high strength steel body and cast aluminum head complement this new design in a swivel head riveting tool. The Klik-Turn sets up to 3/16 Inch steel rivets. Weight: 1.2 lbs.