Lowell Corporation manufactures wrenches designed for pipeline work. The company's "bolt-thru" sockets eliminate bolt interference, and ratchet handles are available from 8" to 60". Sockets are available in hexagon and square sizes (inch & metric). Lowell's 8C 4-IN-1 ratcheting box wrench, for example, combines four 12-point sockets in one heavy-duty reversible ratchet wrench (1-1/4" x 1-1/8" x 1-1/16" x 15/16"). Lowell also makes strap wrenches, valve wheel wrenches, torque-limiting T-handles, and valve key sockets for turning worn valve operating nuts.