The Yak Attack Screwball 1.0 in. Ball with MightyBolts is compatible with the Wilderness Systems SlideTrax Accessory System as well as other track systems.
The screwball mount with mighty bolts works great with tehGT90 Track system. Also tried the cell blok battery system but found the total weight to cause the Kayak to list. and opted for the track screwball to do the job much better.
Pretty cheap...will split open if you barely over tighten the least little but. Its too loose if you dpon't. I am on #3 now and won't buy another.
This is a terrible product. The ram mount just crushes the ball and never gets tight. I filled cavity with 5 minute epoxy and it made it a little better. I will not recommend to a friend.
Works great if you need a 1" ball and you want to move things around on a track.