RAM-KNOB5LU RAM Key Lock Knob with Brass Insert for C S

The RAM locking knob, includes a brass 5/16"-18 thread, for 1.5" socket arms; this allowing you to disengage the screwing of the knob. Once you have set your mount in the location you need, you can lock it in place and feel safe that your mounted device will stay right where you left it. HARDWARE INCLUDED (2) Keys PACKAGING TYPE Poly Bag WEIGHT 0.3 lbs.