RAM-B-121BU

The yoke clamp base will fit rails in diameter from 0.625"(1,6cm) to a maximum of 1.25"(3,2cm).
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.

Clamp Range: 0.625"(1,6cm) - 1.25"(32mm)
Weight Capacity:  Standard Use: 2 lbs (0,9kg)
                          Heavy-Duty Use: 1 lb (0,45kg)