The YakAttack Screwball is the perfect solution for mounting accessories on your kayak. This 1" ball mount attaches directly to your YakAttack GearTrac, MightyMounts, or many other universal track systems. Easily slide the MightyBolt into your track system and screw the ball to tighten into place. As an added layer of security, there is a rubber washer underneath the ball to allow compression and assist in securing the screwball. As always, YakAttack uses high-quality materials that are perfect for even the harshest marine environments.