RAM® Double Ball Yoke Clamp Mount with Round Plate - Long RAM-264U Tighten the knob on the

Tighten the knob on the metal strap with a screwdriver until it has a firm hold on the rail

The RAM-B-138-GA47 consists of a double socket arm

5" diameter round plates with the universal AMPS hole pattern

75" square plate contains 4x100mm holes and 4x75mm holes in each corner

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

RAM® Double Ball Yoke Clamp Mount with Round Plate - Long RAM-264U Tighten the knob on theThe RAM B 121U C consists of a yoke clamp base, LONG length double socket arm and round 2. 5" base that contains the universal AMPs hole pattern. The yoke clamp base will fit rails in diameter from 0. 625" to a maximum of 1. 25". The 1" rubber ball is at a right angle to the plane of the mount; when connected to a rail, the ball sits parallel to the rail. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has