Cannon Aluminum Swivel Base Downrigger Pedestal - 4" 
NEW - Innovative Trolling System Puts You In Control
Aluminum Swivel Base Downrigger Pedestal
For surface or track mounting, this smooth action swivel base provides for 360° rotation, with 16 locking points spaced every 22.5°. The top plate is pre-drilled and tapped for mounting Cannon downriggers, as well as other downrigger brands.
Quick Guide (pdf)
Owner's Manual (pdf)