The S-14 is equipped with a rail mount easily mounted on the hand rails of your boat. This rail mount is made up of the S-12 Inboard Mount and the D/S-15 Rail Cap. The rail mount will fit both round rails from 3/4” to 1 1/4” and square rails from 3/4” to 1 1/4”. The salty series rod holders will hold rods up to 1 3/8” in diameter.