Storm & Security Door Mortise Locks

The Marks K22 is a knob and rose replacement kit designed for doors using Marks 22AC/26D mortise locksets. It solves the problem of broken or damaged knobs on ornamental iron mortise locks, restoring security and function to exterior and interior doors...

The Marks USA 22DW is a storeroom mortise lock designed for security doors, storm doors, and screen doors. This single-cylinder lock keeps the outside knob secured at all times, requiring a key to retract the latchbolt. Inside, the door remains always...

The Marks USA K9117 turnpiece kit converts double-cylinder mortise locks into single-cylinder models, ideal for homeowners and facility managers securing storm doors and security doors. This retrofit kit eliminates the need for a key on the interior...

The Marks 22F is a panic-proof mortise lock for iron security and storm doors. The inside lever always retracts the bolt instantly, even when locked from outside, meeting fire safety codes for residential doors. It fits narrow-stile iron doors with...

The Marks 21AC is the lever-handle sibling of our best-selling 22AC iron door lock, built on the same narrow-stile UniLock mortise body that fits ornamental iron security doors and storm doors. If your iron door currently has a lever rather than knobs,...

If you own an ornamental iron security door or storm door, this is almost certainly the replacement lock you are looking for. The Marks 22AC is the industry-standard narrow-stile mortise lockset for iron doors, and it is our single most reviewed product:...

The Marks 9215AC is the lever-and-plate styling of the company's ornamental iron door mortise locks: the same narrow-stile UniLock body that fits security doors and storm doors, dressed with a full escutcheon plate and lever for a cleaner, more...

This knob assembly kit from Marks USA provides replacement or upgrade knobs for the K21AC/3 mortise lockset, ideal for ornamental iron doors, security doors, and storm doors. The bright brass finish complements traditional and contemporary entryways...

Broken or worn knobs on a Marks iron door lock do not mean replacing the whole lockset. This K22 knob and rose kit replaces the exterior and interior knobs on the Marks 22AC/3 ornamental iron mortise lock, and it also converts a 21AC/3 lever lock to knob...

The Marks USA 9225AC is a mortise lock designed for security doors, storm doors, and screen doors. It solves the need for reliable, durable entry hardware on ornamental iron installations. This complete lockset includes lever knobs, two cylinders keyed...

The Marks Thinline 2750 is the slim version of the company's iron door mortise locks, made for storm and screen doors whose stiles are too narrow even for a standard 22AC body. If your aluminum storm door or thin-frame screen door needs a real mortise...