These long travel adjustable work supports are used to eliminate chatter and workpiece deflection. The wide range of clamping heights makes them very versatile for use in a wide range of applications. The Acme style thread provides infinite height adjustment and eliminates the need for shims while reducing set up time. These supports can be used in both vertical and horizontal applications. Accessories are available to meet specific application needs. Tested to handle up to 40,000 lbs of load, made from 1144 stress proof steel with a black oxide finish.