Black River Tools Square Rail Clamp

PRO SERIES BASES: 1/2'' diameter threaded center hole. Maximum holding power. Interchangeable with all Pro Series rodholders. Accepts lantern holder. LI'L PRO BASES: 3/8'' diameter threaded center hole. Accepts Li'l Pro Series rodholders. Will not accept lantern holder. NOTE: Pro Series & Ll'l Pro are not interchangeable. Universal Clamp: Opens to 1-7/8''. Star Base: Fits 2'' flat surface. 1/4'' mounting holes. Flat Rail Base: For 1'' or wider flat rails or any flat surface. 3/16'' mounting holes. V-Round Rail Base: V-shape on bottom allows base to be mounted on any size rail or curved surface. 3/16'' mounting holes. Side Mount Base: Designed for jonboat gunnels where vertical holes cannot be drilled. May be bent to fit most mounting locations. 1/4'' mounting holes. Round Rail Clamp Base: For 7/8'' or 1'' dia. rails. Adjustable rod angle. Square Rail Clamp Base: Up to 1-1/4'' square rails.