E-Image EI-A53 3.5 Inch Mini Articulating ArmE Image EI A53 3. 5 Inch Mini Articulating Arm The E Image EI A53 is a simple way to add position adjustment to any acessory in your arsenal. Both of the 1 4 20 male threaded mounting points allows over 180 degrees of adjustment. A single thumbscrew lock the assembly into place. Key Features 3. 5 in length 1 4 20 threaded mount on either end Each mount provides 180 degrees of pivot Sturdy metal build