The RAM locking knob, includes a brass 1/4″-20 thread, for 1″ (B size) socket arms. This knob replaces the standard thumb wheel knob on the double socket arm. When locked, the mechanism is disengaged so that the knob merely spins. Once you have set your mount in the location desired the mount cannot be removed without the use of the key (or tools to remove the base).
Material: Composite with brass fittings
Ball Size: 1″ Rubber Ball “B” Size