RAM® Large Round Plate with 6-Hole Pattern & Ball 

The RAM-D-202U-SYM1 consists of a 2.25" diameter rubber ball, connected at right angles to a 3.68" diameter round base.  There are 6 pre-drilled holes in the base.

Features:

• Plate Size - 2.5" Diameter
• Ball/Socket Size - D Size (2.25")
• Materials - Marine-grade aluminum