Each CX5 High Security key comes with a specially milled security groove along the blade of the key. This security groove activates a series of spring-less side pins that, when in perfect alignment, allow the CX5 side bar (the secondary locking mechanism) to retract from the cylinder housing.

Each side pin has four (4) unique depths, or three (3) for Small Format Interchangeable Cores or SFICs. This significantly multiplies the number of unique keyways available per primary profile.