Part Number 1854021 MKA-21, Specially designed for electric steer bow-mount motors no larger than 80lbs of thrust and 60” shaft length Compatible with most Minn Kota Ulterra, Terrova, PowerDrive, PowerDrive V2, PowerDrive Pontoon or Deckhand 40 trolling motors; NOTE: Not for use with any 112 lbs. thrust motors or any motor with a shaft length of 72” or longer. Instead use the MKA-53 model. FEATURES: Quick release mounting bracket allows for quick removal and reinstallation of the trolling motor to the boat deck. Conveniently and easily remove the trolling motor or reinstall it on the bow of the boat when fly fishing from the boat. INSTALLATION: Low-profile slider design mounts the traction motor to the top bracket, to connect the two parts of the quick release plate, simply place the large outer plate over the smaller inner plate and thread the stainless steel “U” shaped handle through the side of the mounting plate and through the outer metal pins. Once in place, you can use a padlock through the hole in the outer metal pin to help prevent theft. In addition, you can run a padlock through the hole in the external metal locking pin, and the locking handle can be secured with a 1/4”, short-handle padlock for extra security (not included) to help prevent theft.