RAM Pin-Lock Security Kit for Single Swing Arms and Gimbal Brackets (RAP-S-KNOBG-109U) (sku 54824)The RAP S KNOBG 109U includes Pin Lock security knobs keys for single swing arms and Gimbal brackets. The RAP S KNOBG 109U offers the ideal amount of leverage to properly tighten your mount to prevent slippage in heavy chop or in extreme vibration environments. With an emphasis on aesthetics and function, the RAP S KNOBG 109U is low in profile and only adds a small amount of additional bulk to your system when compared to the standard knob included.