RAM® Pin-Lock™ 5-Pin Security Knob for Swing Arms RAP-400-2-238-MS2 square rails and irregular shapes

square rails and irregular shapes like a Python

This kit includes the fixed swing arm which means the socket can not be rotated

with double ball SHORT arm

this adapter joins to base plates with the screws provided and turns the flat base into a rail base

RAM® Pin-Lock™ 5-Pin Security Knob for Swing Arms RAP-400-2-238-MS2 square rails and irregular shapesThe RAP S KNOB6 5U consists of a 3 8" 16 female threaded security knob and key knob. The RAP S KNOB6 5U replaces all knobs on RAM single and double swing arms. The RAP S KNOB6 5U 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 KNOB6 5U is low in profile and only adds a small amount of additional bulk to your