Railblaza Starport HD with Starport HD Tracmount Kit eplacement for preexisting external mount bases from Scotty, RAM, Cannon, Fish-On Compatible with the same hardware that is currently used to keep your base mounted to your kayak Includes: 2 x 1/4 x 1 Hex head machine screws 2 x Plastic knobs 2 x Stainless steel TracNuts 2 x Spacer Washers