Six stainless steel Yakattack MightyBolts with 1/2″ Wide Head.Compatible with YakAttack MightyMounts, 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).Six stainless steel MightyBolts1/2″ Wide Head1/4-20 ThreadingMade in the USA