Narrow Stile Door Lock DDML021 delivers reliable performance for aluminum frame doors, slim profile entrances, and commercial access systems where space is limited but strength is critical. Manufactured using solid 304 stainless steel along with brass or zinc alloy internal parts, the lock ensures long-term durability under high-frequency use. It meets CE EN12209 and DIN 18251 standards with a tested lifespan of 200000 cycles, while also achieving EN1634 fire resistance up to 240 minutes, offering both mechanical reliability and fire safety compliance for demanding environments. The reversible latchbolt allows flexible installation without additional modification, improving efficiency during bulk installation projects. Compatibility with Euro profile cylinders ensures easy integration into existing door systems.

1. 20–35mm Backsets

The DDML021 Narrow Stile Door Lock is available with 20mm, 25mm, 30mm, and 35mm backsets for doors with limited internal stile space. Door manufacturers can select the size according to the profile cavity, cylinder position, and lever installation requirements. This range helps prevent interference with glazing beads or internal profile walls and improves compatibility during door preparation and volume assembly.

2. Two Center Distances

The lock is available with an 85mm or 92mm center distance and an 8×8mm follower for connection with commonly specified lever spindles. The Narrow Stile Door Lock can be configured around the project’s cylinder, handle plate, and lever combination. These options help buyers standardize door preparation while supporting hardware specifications for different regional markets.

3. 16mm and 22mm Forends

The stainless steel forend has a thickness of 2.5mm and is available in 16mm or 22mm widths to suit different narrow profiles and lock pockets. The 16mm option serves restricted installation areas, while the 22mm version covers wider prepared slots. Radius-head and square-head designs are offered to match different routing and profile machining methods.

4. Selectable Bolt Materials

Both the latch bolt and deadbolt can be manufactured from brass, zinc alloy, or stainless steel. Follower material options include brass, zinc alloy, steel, and stainless steel. Buyers can choose a component combination based on project budget, usage frequency, door weight, and environmental conditions, allowing DDML021 to support different performance levels and target-market requirements.

5. Coordinated Finish Options

The Narrow Stile Door Lock is available in SSS, PSS, PVD, antique brass, and antique copper finishes. These surface choices coordinate with narrow-stile door handles, hinges, and other visible hardware. Radius-head and square-head forends can match the prepared slot shape, helping door manufacturers complete order-based machining and maintain a consistent finish across the hardware package.

1. Shopping Mall Glass Doors

Retail entrances in shopping malls often use narrow metal-framed glass doors where the profile width and glazing position restrict lock space. DDML021 offers 20mm to 35mm backsets and a 16mm forend option for matching compact profile cavities. The Narrow Stile Door Lock also uses an 8×8mm follower for convenient connection to lever handles used on storefront entrances.

2. Office Partition Doors

Meeting rooms, private offices, and glazed partition areas require compact locks that preserve clean frame lines. The Narrow Stile Door Lock offers 85mm and 92mm center distances for different cylinder and handle-plate arrangements. Radius or square forend designs and several metallic finishes allow the lock to coordinate with office door frames and interior design specifications.

3. Aluminum Entrance Doors

Aluminum door systems vary in profile section, lock-pocket width, and internal reinforcement layout. DDML021 provides four backsets, two forend widths, and a 2.5mm forend thickness for profile-based selection. Multiple material choices for the latch bolt, deadbolt, and follower support residential entrances, commercial storefronts, and interior aluminum swing door projects.

4. Hotel Functional Areas

Conference areas, restaurant rooms, and service spaces in hotels may use narrow-framed doors that require compact hardware and coordinated finishes. The Narrow Stile Door Lock is offered in SSS, PSS, PVD, antique brass, and antique copper. Its 16mm and 22mm stainless steel forends also allow contractors to standardize installation according to the prepared lock-pocket width.