The Summit Ram to Track adapter slides into a 3" Cisco, Traxtech, Bert's...ect track and adapts to a 1.5" type C ball mount. This can be used in conjunction with the Summit boat mount.
This item included 1 type C 1.5" Ram ball, Aluminum anodized track adapter, and 2 thumb screws.
Ball bolt pattern - 1.5" x 2"
Type D Ram ball may be used with plate.
https://rammount.com/collections/popular-components-d-size/products/ram-d-202u-225#
Not sold without 1.5" ball
TRACK NOT INCLUDED