Gullsweep rail or pipe mount. Takes seconds to put in place and seconds to remove, then store when your boat is running. Gullsweep® performs best when it is level to the water. Place vice clamp over railing & tighten so it is vertical to the rail. (Option, put tape around rail before mounting to indicate where GS-RM should be mounted, and also to protect the rail.) Adjust center support pin to be vertical to the water & tighten adjustment nut. (See B) Place your Gullsweep® on the support pin, adjust, if not level. If clamp is left on rail, remove center pin to avoid injury! Model GS-RM (up to 1-5/8” dia.) Center pin (shown) is not included with GS-RM because it utilizes the standard pin that comes with a Gullsweep (GS-1).