It is equipped with 1/4" screws on both ends respectively. Thus, it could attach monitor via the 1/4" screw on the one end and attach accessories with 1/4"-20 threaded holes on the other end, like cage, Nato Rail 1973, 15mm Rod 1182 and Quick Release Rod Clamp 1976 etc. Mounted with 1/4" screw is a rubber cushion which could prevent the scratches of monitor and help to lock the monitor tighter. It features an ergonomic wingnut for great convenience that could help to adjust any angles based on your needs..