The RAP-S-KNOB6U consists of a 3/8"-16 female threaded security knob and key knob. It replaces all knobs on RAM single and double swing arms. The RAP-S-KNOB6U offers the ideal amount of leverage to properly tighten your mount, preventing slippage in heavy chop or extreme vibration environments. With an emphasis on aesthetics and function, it is low in profile and adds only a small amount of additional bulk to your system compared to the standard knob included. At a fraction of the cost of currently available keyed locking knobs, the additional peace of mind and tamper resistance come at a very affordable price. The RAP-S-KNOB6U is the perfect accessory for keeping your mounted electronic device safe from theft and tampering.