This track mounting solution includes the high strength composite RAM ROD fishing rod holder and is compatible with the RAM Tough-Track. An excellent addition to the left side of your boat, the Track Base is designed to not loosen while trolling. With the Ratchet Attachment and Extension Arm, you'll have plenty of room to take advantage of the RAM ROD's tilting cradle and ability to rotate 360 degrees. T-Bolt Dimensions: .48" x .95"