ProX XT-QSLIDERX4 Set of 4 Quick Release Sliding Truss Clamp Mounting Adapters Ideal For Fastening Moving HeadsProX XT QSLIDERX4 Set of 4 Quick Release Sliding Truss Clamp Mounting Adapters ideal for Fastening Moving Heads, Professional Stage Lighting, and Accessories. This pack of four quick release truss clamp adapters with removable sliding connector saves you a ton of time when it comes to setting up professional lighting. These adapters are ideal for use with moving heads where the user can keep the clamp attached to the adapters for quickly mounting and