The Cisco Scotty Downrigger Adapter Plate gives trolling anglers a clean way to mount a Scotty downrigger to Cisco systems when setting up for salmon, trout, and walleye spreads. This 5 1/2 x 5 1/2 in. adapter plate fits Scotty downriggers with a swivel, stationary, or tilt-up base, making it a practical solution for boat rigging, upgrades, and replacement installs. It attaches to Cisco Multi-Mounts and Cisco Lund, Tracker, and Alumacraft mounts, so it fits into many common trolling layouts without unnecessary guesswork. The swivel base corner holes are 5/16-18 threaded, the 3-3/4 in. x 1-3/4 in. hole pattern is 1/4-20 threaded, and the 2-5/8 in. x 5 in. hole pattern is 10-32 threaded, giving anglers the exact mounting details needed to match the right Scotty setup.5 1/2 x 5 1/2 in. adapter plate fits Scotty downriggers with swivel, stationary, or tilt-up basesAttaches to Cisco Multi-Mounts and Cisco Lund, Tracker, and Alumacraft mountsSwivel base corner holes are 5/16-18 threadedAdditional threaded patterns include:3-3/4 in. x 1-3/4 in. in 1/4-202-5/8 in. x 5 in. in 10-32 Made in the USA