These tie-downs come with a Mighty Bolt base. Compatible with YakAttack MightyMount’s, GearTrac, and most other kayak track systems from Scotty Fishing Products, RAM Mounts, and YakGear. For FeelFree Kayaks, 3 Water Kayaks, and Jonny Boats you will need an adapter to be compatible. We offer the needed adapter in a single pack (AAP-1012) and a six pack (AAP-1012-6). Perfect as an anchoring point to secure a cooler or other accessory, as well as being a great adjustment point for directing steering cables on the deck of your kayak. Sold in a two-pack.