Dock-A-Rod 90 Degree Fishing Rod Holder with Adapter for Round Dock Posts Made in USA, Rod Racks - Canada

Crestliner Fishing Boat & SureMount Gunnel System Accessories

Fishing Rod Racks - Dock and Deck Supply

Boat Rod Holder - Canada

Traxstech Fishing Accessories

Dock-A-Rod 90 Degree Fishing Rod Holder with Flag Pole Adapter Insert for Dock or Boat Made in USA, Rod Racks - Canada

Rod Holders, Downriggers, Boat Track Systems

Crestliner Fishing Boat & SureMount Gunnel System Accessories

Four 10 Aluminum Boat Fishing or Pole Rod Holders - Angled at 90 Degr – Marine Fiberglass Direct

Crestliner Fishing Boat & SureMount Gunnel System Accessories

Clamp Rod Holders Boats

Rod Holders - LOTWSHQ

Approximate depth of 7-1/2 when fitted, and with a 4-1/2 by 3-1/2 base.

Rod Holder Stainless Steel Flush Mount 30 Degree

This ain't the best drawing, but is fishing rod bipod a thing? : r/Fishing_Gear

Fishing Rod Holder

2 Fishing Rod Holder