I would like to receive advertising materials from Al.ion plc and its affiliates and third parties selected by Al.ion, including newsletters, updates and promotions..Save up to on the Schlage F PLY from Build.com. Low Prices Fast Free Shipping on Most Orders. Find reviews, expert advice, manuals specs for the Schlage F PLY..Schlage is a house hold name synonymous with security. For more than years Schlage has been setting the standard for security products and door hardware in the United States..Like many lock manufacturers, Schlage uses milled complex keyway shapes to mechani.y prevent some non OEM keys from entering or operating a lock. New keyway designs may be protected for a limited time by patent protection, which expires after a set number of years..