Classic two-piece telescopic boom arm with 3/8" thread. Silent, scratchless swivel joint for adjustment of angle, easy tightening with T-bar locking screw. Boom arm: 2-piece telescopic design Boom arm length: From 435 to 745 mm Clamping: T-bar locking screw Material: Steel Threaded connector: 3/8" Weight: 0.59 kg