Products

Creating window balances since 1888. For more than 135 years, the Caldwell brand has specialized in enhancing the hung window balance industry, extending AAMA to Class 6 and developing easy solutions for every window type. Featuring Interlock's sash lock systems.

From inventing the first automatic sash lock system for vinyl windows to creating the only magnetically triggered sash lock on the market, the Interlock brand has pioneered the development of Sliding Windows Solutions in North America.

Interlock Casement & Awning Window Solutions are some of the most advanced hardware products available on the market today.

Heavy duty MAGNUM^® solutions for all commercial grade windows & doors. From MAGNUM^® 4-bar hinges and OMNI DRIVE^™ operators to revolutionary multi point locking systems, these solutions are engineered to optimize security, ease of operation and flexibility through their innovative features.

With 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 solutions and the most versatile hardware available

Designed 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 options

Interlock Fold Door Hardware combines aesthetics with performance and versatility to create ideal solutions for the modern home.

Interlock 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

Tools to simplify hardware installation for all of our customers.

With 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.