This set of four Leg Clamps from Kessler Crane connects two separately available Kwik Rails or other third-party rails with four legs to create a slider system for the Kessler Crane Shuttle Dolly. Each heavy-duty clamp features two rod clamps with locking levers to secure the rail to a leg, which allows you to adjust the height of the track. The clamps support any rail diameter from 1.635 to 1.652".