440lb truss clamp Stage light clamps,Aluminum alloy heavy duty truss stage lighting O clamps fit 1.88-2 inch pipe diameter for DJ Lighting Projector Par Lights (Silver) : Amazon.co.uk: Musical Instruments & DJ
Unicol GKUT1 Gyrolock Universal Projector truss mount (23-30cm drop; Max 12kg)
UNICOL | Truss Clamp Compact Universal Gyrolock Projector Mount (GKCUT)
Telescopic universal bracket for video projectors with truss clamp - Ref. PTR-15/G | GUIL
Projector truss mount Quick Release short: Audipack, It's great to have solutions