The Scanstrut ROKK Rail Mount is used to install fishfinders and chartplotters at the helm, RIB console, fishing boat dashboard, nav station, and more. This multi-position mount installs your instruments directly onto pushpit or pedestal rails, fitting rails from 1" to 1.25" (25.4mm to 33.7mm) in diameter. Modular design. No top plate. Model#: RL-RM. Installs directly onto pushpit or pedestal rails Fits rails from 1"" to 1.25"" in diameter Modular design - no top plate | Scanstrut ROKK Rail Mount - Modular Design - No Top Plate