The next major part to be installed is the platform. Two screws are inserted through the platform to retain the outer lock cylinder. A geared shaft is also installed into the platform. The geared shaft forms a connection between the outer lock cylinder, the cylindrical deadbolt and the rim lock bolt. A second channel section is then inserted on top of the platform. This channel section holds the rim lock bolt in position.

Six screws are inserted through the channel and platform sections to fasten the rim unit parts onto the door. These screws are fastened into solid door material above and below the one inch hole drilled for the cylindrical deadbolt. In my opinion, this is one of the real secrets of the Ultimate Lock system. The platform and channel sections spread the holding strength over a large area. This prevents the thin sections adjacent to the cylindrical deadbolt from taking the full brunt of a forced entry attack.

Lastly, a decorative trim cover is installed over the platform and channel parts. This trim houses the inner thumb turn and a lock-out button. When the Ultimate Lock is in a locked position, the lock-out button can be positioned to prevent both deadbolts from retracting. Even if the outer cylinder could be ‘bumped’ or picked open, the cylinder is prevented from turning far enough to unlock the door.