By locking the trigger, it can be used safely. The outer opening makes it easy to attach and detach thick wires and belts. Lock the trigger to prevent them from falling off. Tip for hanging wire ropes and chains. Basic load (t): 0.04 inches (1.2 mm). Compatible chain diameter (mm): P: 4.3 inches (109 mm). Dimensions: A: 0.8 inches (22 mm). Dimensions (mm): Dimensions: 1.1 inches (29 mm); Dimensions: 0.8 inches (21 mm); Dimensions: 0.6 inches (15 mm); Breaking Load: 2.3 lbs (59 kN).