The Hobie 72023016 RAM Scotty Mast-Tube/Hobie Wedge Base with 1.0" Ball allows you to mount practically anything. Slide it into the round opening of your rod holder base and tighten the screw. It expands to fit holes from 7/8" - 1" diameter and locks tightly. You can mount just about anything from RAM rod holders, GPS, cell phone, cup holder, fishfinder, flashlight, etc.
Compatible with Scotty bases and Hobie Kayaks with sail mount ports 7/8”- 1” diameter