All the ease and convenience of the u-mount clamp is now available for your lighting fixtures. The keyed pressure pad of the LTA8770 will never rotate, meaning your lighting bars won't be marred by bolts like other designs. The incorporated 40mm bolt and wingnut will easily accommodate most common lighting fixtures. Mounts to any bars between 1-3/8" to 1.5" in diameter including the popular LS7730 Lighting Truss System.