This Bogen Manfrotto 814-1 Hydrostatic Arm is the shortest arm at 5.1 is also the most powerful. The pivoting pin is threaded with 1/4-20 and 3/8 studs so it can be attached to the top of a video camera to support a small monitor or other video accessory with an exceptional load of 7.7 lbs. This arm also features a unique hydraulic lock that ensures no movement with the minimum of effort. This arm replaces the Bogen Manfrotto 814.