No more ball mounts, no more slipping or rotating in the track. With the LockNLoad mounting system this is the cleanest and most secure mounting solution for Garmin and Raymarine units featuring a 3 hole pattern round base such as the Garmin Striker 4 and the Raymarine Dragonfly 7 Pro. Features the LockNLoad mounting system offering ultra secure attachment, 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. Hardware included.