Products All products from Interlock USA are intelligently engineered, fully tested and designed for optimum performance, ease of installation and superior aesthetics. Most products are available in a variety of finishes. If you have a request for a product that you do not see listed or would like a solution tailored to your specifications, please contact us directly. Sliding & Hung Window SolutionsFrom inventing the first automatic sash lock system for vinyl windows to creating the only magnetically triggered sash lock on the market, Interlock USA has pioneered the development of Sliding and... Casement & Awning Window SolutionsInterlock Casement & Awning Window Solutions are some of the most advanced hardware products available on the market today. From aesthetic covers and stainless steel operators to revolutionary new... Sliding Door SolutionsWith a wide variety of solutions for single and multi-panel applications, the Interlock® sliding door product line features an unparalleled selection of handle styles, smartly engineered locking... Swing Door SolutionsDesigned to fit single panel and French door applications, Interlock Swing Door Solutions feature single and Multi-Point Mortice locks in various configurations and with a variety of modern handle... Folding Door SolutionsInterlock® Fold Door Hardware combines aesthetics with performance and versatility to create ideal solutions for the modern home. Our newest line, the HEMISPHERE® System for flush panel folding doo... European Hardware SolutionsInterlock USA is proud to be the exclusive distributor in North America for the complete range of products from Germany's leading manufacturers of European hardware solutions: The SIEGENIA-AUBI Gro... Secondary SecurityWith a unique range of secondary security devices, INTERLOCK® products are designed to fit a variety of window and door applications and may also be retro-fitted. Securichain A security device for... Proprietary SolutionsSince 1994, when we began designing proprietary hardware solutions for some of the nation’s premier window and door manufacturers, we’ve been leading the industry—engineering generation after... Commercial ApplicationsThrough our parent company, ASSA ABLOY, Interlock USA offers a complete range of security and hardware products. ASSA ABLOY is the global leader in door opening solutions, dedicated to satisfying...