RAM® D Ball on 35mm x 75mm base RAM-D-2462U

This RAM-D-2462U consists of a 2.25" rubber ball, connected to a 3.6" x 2.1" plate with a 35mm X 75mm VESA hole pattern.

HOLE PATTERN - 35 x 75mm Half VESA

BALL SIZE -D Size (2.25")

WEIGHT CAPACITY - Standard Use: 6 lbs,Heavy-Duty Use: 5 lbs

MATERIALS: Marine-grade aluminum

WEIGHT: 0.56 lb

Is the 35mm center to center on the holes or is that inside to inside meaning I can put it over a 35mm rail with square bolts

The spacing listed for the RAM-D-2462U is hole center to hole center.