Unique performance, convenience and safety features are built into every Lift Master Boom. Fabricated from structural steel with welding to meet AWS creates a rugged and durable boom that will provide long term service. Telescopic units come with an infinitely adjustable locking screw (except orbit booms which features a locking detent). Fork pockets for 3,000 and 4,000 pound capacity models measure 7½"W x 2½"H usable. Usable fork pockets are 7¼"W x 2¼"H for 6,000 and 8,000 pound uniform capacity models. A 36" safety restraint secures the boom to the fork truck for safe operation. Each unit includes two lifting hooks.