Our "C" Mount 
Bases allow you to secure rod holders and other accessories without 
drilling holes. Attaches to any edge. it has  2-1/4" (5.72 cm) opening and 1 1/2" (3.81 cm) 
inside opening  and is 1-1/8" (2.86 cm) wide x 3/8" (0.95 cm) thick. Mounting holes are on 
the top and end.
Clamp will accept any of the Tite Lok Rod Holder series.
Includes Pin-Lok Washer HP-5600