This Low-Profile Swivel Base is only 1-1/8" tall. It has six-point locking, including two 45° positions. 5" x 5" x 1-1/8". Screws included. Fits all Cannons except the Mini-Troll. The Cannon Tab Lock Base is designed for small-body downriggers, Easi-Troll and Mini-Mag. 5-3/4" x 5-1/8" x 1-3/8". Screws included. Available: Tab Lock, Low-Profile Swivel. Downriggers/outriggers/planer Boards