RAM Mount Large Tough-Claw Base w/Double Socket Arm & 1.5" Round Base Adapter [RAP-401-202U]RAM Mount Large Tough Claw Base w Double Socket Arm & 1. 5" Round Base A dapter The RAP 401 202U consists of the large Tough Claw base, double socket arm and round base adapter. The RAM Tough Claw: is the perfect mounting base for quick and easy tool less installation and removal on round, square, odd shaped rails and bars. The Tough Claw can be clamped on rails from 1" 2. 25" outer diameter. The round base adapter contains the industry standard