If you've ever needed an arm to attach a light, monitor or other accessory to your tripod, l bracket, or long plate, 3lt's pivot magic arms are for you.pivot arms feature a ¼” 20 screw thread at either end to connect to either the accessory or the mounting point. These are screwed into place using the knurled rotational locks that optimise grip for a secure mount.each screw thread can be precisely positioned using the omnidirectional ball socket at its base. A large wing knob controls both the angle of the pivot arm and the placement of the ball sockets, which offers users huge versatility.formed from aerospace grade magnesium alloy with stainless steel fixings, these robust pivot arms boast impressive load capabilities 5 kg 11 lb for the pivot 150, and 3kg 6.6 lb for the pivot 250. This is more than enough for most standard lights, mics and monitors.