Attwood 5016-3 Fishing Rod Holder Extension, Black (Renewed) Price: $8.43 (as of 23/10/2020 20:16 PST- Details) & FREE Shipping.

For use with the Attwood Combo Mount, Attwood standard side mounts, and other leading rod holder mounts
Allows you to mount your rod holder on a side rail
Complete with all necessary hardware to mount to rail