This is a very economical way to prevent damage to your rods when fishing of piers, railed sea fronts and boats. You simply strap the Uni rest to the rails and you have a useful and effective rod rest.
To fit you simply unscrew the rest head, remove the strap from the saddle and strap around the fixture. You then tighten the strap and re-fit the rest head.
The rest can be removed and re-used at various locations and comes with fitting instructions.