The Scotty Universal Sounder Mount uses a multi-pattern universal top plate and the Scotty post mount design for quick removal and infinitely adjustable rotation. Simply fasten your sounder bracket to the top plate, then lock down the sounder mount into your favorite Scotty mounting system. Locked, loaded, and ready to start catching fish! (Sounder No. 241 Side/Deck Mount and sounder fasteners not included. Only intended for use with fish finders and other marine electronics.)