The v4 boom arm is an ingenious new mechanism combining a gearedslide elevator with a 180degree tilt arm and a 360degree horizontal pan it is quick and easy to use a single twist of the grip at the end of the multi angle arm loosens both the tilt and rotation and when the arm is in the desired position a twist of the grip in the opposite direction re engages the lock and the arm is fixed again it will fit onto and transform almost any tripod thanks to the included choice of 14 or 38