Description Driftmaster Flat Rail Base 201-B The Driftmaster Flat Rail Base 201-B can be used on 1″ and wider flat rails, or any flat surface. Its 1/2″ diameter threaded center hole provides great holding power. For 1″ or wider flat rails. Can be used on any flat surface, especially on pontoon boats. Compatible with any Pro Series rod holder or lantern holder. 3/16″ diameter mounting holes.
