This Impact CC-125 Adjustable Gaffer Clamp features one permanent 5/8" Baby stud and one removable Baby pin for mounting lights or other accessories with a 5/8" female receiver. You can also leave the pin out and use the clamp's 5/8" receiver to mount the clamp directly to Baby studs and pins on other accessories The clamp's jaws adjust from 0.98 to 2.55" and are rubber cushioned so as not to damage furniture, poles, pipes or overhead beams on set or on location.