The RAP-SB-187-UN7U consists of the RAM EZ-Strap™ base double ball SHORT arm and universal X-Grip® cradle. The strap can be cut to fit tubing square rails and irregular shapes from 0.5" to 2.58" in diameter. Multiple adjustment points allow you to move the universal X-Grip® cradle to your optimum viewing position. This mount rotates 180 degrees.