PERFECT!!!!!!  THEY ARE THE BEST  CLAMPS OUT THERE. Don't buy C clamps for chauvet portable trussing there had to get on and off. As for O clamps it's a hook and go  no worries for your light falling off. You would only need safty cables on there if you were leaving your lights up all night befor the gig so if the clamp fails to work the safty cable catches your light