Scotty #140 Transducer Arm Mount has been designed for kayak anglers needing an easy way to install transducers for transport. when fully extended and swivels 360 degrees. Scotty manufactures products that are sold into the fishing, marine, and outdoor industries worldwide.
eBay
"Scotty’s most popular value-priced, positive locking, open style Rod Holder. The Power Lock is designed with a universal cradle that holds virtually any reel type and has a front locking ring to prevent rod loss while traveling.
eBay
Boat Plastic Fishing Rod Rack Holder Portable Lightweight Spinning Durable Pole Tube Mount Bracket
Aliexpress UK