SPYDERLOK BASE PLATE: The SpyderLok series of rod holders is a favorite of anglers the world over. This base plate is designed for the R100 SpyderLok 4-rod holder. ADD VERSATILITY: Many fishermen prefer more than one mount on their boats for spider rigging. Add one or two more base plates to your vessel for additional versatility of location for your fishing rig. SPECIFICATIONS: The Millennium Marine R101 Base Plate weighs 1-pound. The dimensions are 13.5-inches x 6.5-inches x 3.25-inches. MOUNTS FLUSH: The base plate is designed to mount flush to the carpet and will help reduce the chances of stubbed toes. ABOUT MILLENNIUM MARINE: Millennium Marine has a seating system fit for every body of water and every species - from the saltwater flats of the south to the cool water lakes and rivers of the north.