These adjustable leveling supports are designed to provide accurate height support and alignment for motors, drives and other components where alignment is critical. The internal hole allows for the fastening bolt to pass through to the base of the fixture. The top piece or the base can be threaded to provide precise positioning and support. The lock nut allows the position of the support to be locked into place. The long travel makes them ideal for a wide range of applications. Made from zinc-plated steel with a blue chromate finish.