Driftmaster Rod Holder Base Pro 200B -
Li’l Pro Series: 3/8" diameter threaded center hole. Same shape as Pro bases, but slightly thinner. Accepts any Li'l Pro Series holder. Pro Series: Fits any 2" flat surface. Attach with three 1/4" X 1 1/2" screws in fiberglass or wood. For attaching to aluminum, use bolts.