Tighten the worm drive screws on your Hi-Torq 80 Hubless Coupling with the Clamp-All® Hi-Torq 80 Wrench to secure fitting in place. The wrench bit fits 1/4 in. hex head screws. Tighten screws to a full 80 lbs. of torque to secure in place and form a leak-resistant connection point between pipes. Durable Hi-Torq 80 wrench is made of metal. Use fittings and other valves to set up a new irrigation system, expand an existing system, or make repairs.