These are the rod holders i use when spider rigging made by Hi-Tek Stuff

Brocraft Crappie Rod Holder System with Deck/ Side Mount / Spider Rigging : Sports & Outdoors

Spider Rig Rod Holder Setups For Crappie Fishing Striper, 40% OFF

Hill's Rod Holders

Spider Rigging Rod Storage and Transport Tricks!

Boat pedestal rod holders. Catfish Angler Forum at USCA

Spider Rig Trolling- Made SIMPLE - What-Where-When-How

With this Driftmaster Trolling Bar T-250-H, you can rig your boat for tight-lining or slow-trolling for crappie. Each assembly holds up to four rods allowing you to keep more lines in the water. It features an adjustable design for creating the ideal spread. The holders easily attach to the included horizontal bar with aluminum tube and square base for support and strength. It's simple to remove and disassemble for hassle-free storage when not in use.

Driftmaster T-Bar System

Rod Holders - spider rigging

Commercial/Home Made Rod Holders For Spider Rigging

Hi-Tek Stuff, Products For The Serious Outdoorsmen

Holds up to 4 rods per unit while slow trolling for crappie Telescopic T-bar 14-- 24 inch Easily accommodates 4 rod heads with its 24 tracker

Brocraft Crappie Rod Holder System with Telescopic T-bar/Crappie Fishing Rod Holder