MARKS USA proudly announces the new auto-reverse feature on their popular 5 Series Mortise Lock (patent pending). The advantage of the new auto-reverse feature enables the installer to reverse the handing of the lockset without removing the cover. In five simple steps, you can go from left hand to right hand and never compromise the position of the internal lock parts.

Our Grade 1 Mortise Locks are BHMA Certified, meet ANSI specifications and are backed by the Marks legendary Lifetime Mechanical Warranty. The mortise locks are thru-bolted for proper alignment and ease of installation, have self-adjusting spindles and independent lever support springs. Available with an ever-increasing variety of knobs, levers, roses and plates as well as custom trim, our 5 Series Mortise Locks can accommodate even the most challenging customer’s needs.