Perfect Compatibility: Feelfree unitrack aluminum kayak track adapter compatible with FeelFree, Johnny Boats, Seastream Kayaks, and 3 Waters Kayaks. Work on the kayak track, and adjust the sliding speed of the assembled part on the track Product Feature: Feelfree to kayak track adapter. This adapter creates compatibility between accessories utilizing the MightyBolt as well as other 1/2" wide head t-bolts kayak anchor poles with the FeelFree Uni-Track and Uni-Bar. It can be matched with the kayak guide rail kayak track mount and is easy to install and use Installation: Simply install with no tool required, pay attention to the size of the adapter hole, Insert the adapter plate into the base of the screw, put the o-ring into the screw, connect the spherical accessory, and put it on the track. Easy to adjust the tightness of the assembled part. A little looseness can easily slide, and tightness can easily fix the accessories Package Included: 6 pcs set: Includes six aluminum kayak adapters and six o-ring keepers. Using high-quality raw materials, the perfect replacement for an original part is more durable than the original products. (Note: The Mighty Bolt, t-bolt, is not included) High Quality: Feelfree kayak track adapter made of Military grade and Hard anodized aluminum, not easy to corrode or rust with a long service time, suitable for harsh marine environments, and UV and Marine Resistant Stainless Steel. Makes accessories more stable in the kayak, not falling due to hard marine environments Feelfree Kayak Track Adapter: Kayak track adapter compatible with FeelFree, Johnny Boats, Seastream Kayaks, and 3 Waters Kayaks. Work on the kayak track, and adjust the assembled part on the track.