Avenger Friction Arm with T-Knob Black, Dual 16mm Spigots. The Avenger D244N variable friction arm with a large T-knob is one of the most popular arms from Avenger. Often referred to as the Magic Arm, the D244N is used for lighting, camera, and audio applications and is the industry standard for most remote rigging applications. The variable friction arm D244N features a central friction lock to secure all three points of the arm. The arm is 53 cm long and can support loads of up to 3 kilograms. Typically, the D244N arm is mounted on a Super Clamp or a gravity Super Clamp, but it can also be attached to tripods and other accessories like wall plates using the 16 mm baby pins at both ends of the arm. The baby pins at each end of the arm also have a 9.53 mm/3/8 inch threaded socket or a 6.35 mm/1/4 inch threaded socket. The possibilities for remote mounting this versatile device are endless. Recommended accessories: C1575B, C1550, 125, 147, C155, FF3276, 014-14, 014-38, F301, F831TH.