This track mounting solution includes the versatile RAM Tube Jr. fishing rod holder (RAP-390-NPU) 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. T-Bolt Dimensions: .48" x .95"- Quick release and installation- High strength materials ensure product longevity- Compatible with spinning reels and level wind reels- Position spinning reel to the side or under RAM Tube Jr- Compatible with left-handed and right-handed reels- Lifetime warranty