These Traxstech mounting bases allow you to position your equipment strategically in our track system. When removing your equipment for pleasure boating or storing your equipment in the off season, simply loosen the thumbscrews, slide equipment out of the track and your boat has a nice clean look. Allowing you the flexibility that the Traxstech system offers. The Traxstech swivel base offers an aluminum top plate that is pre-drilled and tapped for the mounting of your downrigger. Our Traxstech downrigger mounts allow you to mount downrigger bases of other manufactures directly to our Traxstech system easily. Our 3/8" diameter stainless steel plunger ensures positive locking strength in the 12 available positions to swivel every 30 degrees.