RAM® Pin-Lock™ 4-Pin Security Knob for C Size and Swing Arms RAM-B-101U-247 The RAP-395T-BCU consists of a

The RAP-395T-BCU consists of a 1

5" diameter round base with the universal AMPS hole patternand a 4" maximum width square post clamp base

The RAP-S-KNOB-VB-109-1U offers the ideal amount of leverage to properly tighten your mount to prevent slippage in heavy chop or in extreme vibration environments

This is the reverse configuration version which means the footing is better suited for right hand drive vehicles

RAM® Pin-Lock™ 4-Pin Security Knob for C Size and Swing Arms RAM-B-101U-247 The RAP-395T-BCU consists of aThe RAP S KNOB5 4U consists of a 5 16" 18 female threaded security knob and key knob. The RAP S KNOB5 4U replaces all knobs on 1. 5" diameter C size arms and mounts. The RAP S KNOB5 4U 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 KNOB5 4U is low in profile and only adds a small amount of additional bulk