The RAM 18" Transduser Mount Arm makes for quick and effective deployment and retrieval of your transducer, while protecting your transducer from damage. Perfect for kayak fishing applications, the transducer arm can quickly be retrieved if you enter shallow water or when beaching your boat. The unique design provides a universal solution for virtually any kayak as well as any transducer. The RAM transducer arm mount is compatible with all transducers that contain a 1/4" screw.