Look at the Primus key here, you'll see the heart of the Primus system-the patented "side-bit milling" along the blade. The unique geometric contour interacts with a matching pin-set inside the cylinder. These side pins must align, as well as the more familiar top cylinder pins and cuts of the key When both simultaneously align, the cylinder rotates to open or close the lock. This dual-locking principle makes the Primus cylinder highly resistant to picking.

For added security in key control, the Primus key is designed to enter a selected standard Schlage Keyways but, the standard key can not enter the "unique" Primus cylinder.

The Primus system eliminates one of the weakest links in any security arrangement: unauthorized key duplication. Schlage carefully controls the key blanks. Certified Primus dealers duplicate the patented key - for those personnel you designate.

The ultimate advantage of the Primus system is its ability to exactly match your needs . . . without sacrificing key control.

Schlage Primus cylinders also include a product line that delivers extra protection from drilling and other physical attack.