Dragway Tools 2 Ton Cross Beam Adapter for Floor Jacks Engine Hoist Shop Crane Maximum Capacity: 4,000 lbs. Extends from 28-inch minimum to 40-inch maximum. 4-3/4-inch adjustable (up and down) rubber pad mounts. Center shaft measures 1-1/4 in. x 3/4 in. with a bolt washer mount. Frame is made of 1/8-inch steel.