This product is designed to allow you add casters onto truss structures, With slots that allow you to either bolt to an end plate, grapple to side cords, or use half couplers to clamp onto truss in more creative ways. The 3/8" holes on 3" centers allow you to easily mount 4" - 8" casters, triple swivel casters, or wagon breaks. There is a 1.5" hole in the center to use with scaffold style screw-jacks for leveling out large outdoor truss structures.
