The RAP-S-KNOB kits include Pin-Lock™ security knobs/keys for double socket arms and Gimbal brackets. It offers the ideal amount of leverage to properly tighten your mount to prevent slippage in heavy chop or in extreme vibration environments. The kits are low in profile and only add a small amount of additional bulk to your system when compared to the standard knob included. The included Pin-Lock™ security knob for Gimbal brackets is a universal design that utilizes various stud sizes to accommodate most popular GPS, chart plotter, fish finder and VHF radio brands. Affordable and simple to install. Pair this with a security knob for your RAM^® mount and you can feel at ease without the concern of theft or tampering.