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Introduction

The entrance of your home or office speaks volumes. Among the first details noticed is the main door lock, and nothing combines modern aesthetics with rugged reliability quite like a black lever handle. Today, we’re diving deep into the Dufix Lever on Plate DX-A Series – Model DX1338 MB (Black version). This isn’t just a door handle; it’s a statement of security, durability, and minimalist design. Whether you’re renovating or building new, this black lever handle transforms a functional necessity into a design asset.

How the DX1338 MB Black Lever Handle Works

The DX1338 MB belongs to the “lever on plate” (also known as lever on rose or backplate) category. Here’s the mechanism broken down:

  1. Lever Action: Unlike a round knob, the lever requires a simple downward push. The spring-loaded mechanism returns the lever to its horizontal position automatically, reducing wrist strain.

  2. Mortise Retraction: When you push the lever, it rotates a spindle connected to a mortise square bar slot inside the door edge. The mortise bolt retracts from the strike plate on the frame, allowing the door to swing open.

  3. Locking Integration: The “MB” (likely Matte Black) version typically works with a standard privacy or keyed cylinder. From the outside, a key rotates the cylinder cam, which blocks the external lever’s motion. Inside, a thumb turn or push button unlocks it instantly. For main doors, a heavy-duty keyed cylinder (often a 5-pin or 6-pin design) is standard.

  4. Adjustable Latch: The set includes an adjustable latch (60/70mm backset), fitting most pre-bored doors without modification.

The result? Smooth, silent, and secure operation that withstands thousands of cycles.

Key Benefits of the Black Lever Handle DX1338 MB

Choosing this specific black lever handle for your main door lock offers clear advantages:

  • Superior Durability: Constructed from stainless steel (SS) grade 304 or similar, the DX1338 MB resists rust, tarnishing, and daily impacts. The matte black finish is applied via electrostatic painting or PVD coating—it won’t peel or fade.

  • Modern Aesthetic: Black hardware is trending for a reason. It contrasts beautifully with white, grey, wood, or even bold-colored doors. It hides fingerprints and smudges better than polished chrome or brass.

  • Enhanced Safety: For a main door lock, the DX1338 MB can integrate with a double-cylinder deadlock (key both sides) or a single cylinder with a heavy-duty latch. The lever design prevents “snagging” on clothes and allows rapid exit in emergencies—just push down.

  • Easy Installation: Fits standard door preparations (54mm bore hole, 25mm edge bore). Comes with clear instructions, mounting screws, and a strike plate. A DIY-friendly job in under 30 minutes.

  • ADA Compliance: Lever handles meet Americans with Disabilities Act requirements (no tight grasping or twisting), making this black lever handle ideal for public buildings or aging-in-place homes.

Applications – Where to Use the DX1338 MB

Because of its robust build and sleek black finish, this lever handle is versatile:

  • Main Entrance Doors: The primary use. The black lever handle resists weather exposure when paired with a weather-stripped door. Use with a high-security mortise cylinder for best protection.

  • Office Partitions: Creates a professional, minimalist look. The matte black finish doesn’t show daily wear from keys or ID cards.

  • Rental Properties & Hotels: Durability meets design. Tenants appreciate the modern feel; landlords love the long life and easy re-keying.

  • Interior French or Double Doors: Use a pair of DX1338 MB handles with an astragal and flush bolts for a seamless black hardware theme.

  • Garage Entry Doors: The sturdy lever and plate withstand frequent use and temperature changes.

How to Choose the Right Black Lever Handle for Your Main Door Lock

Selecting the perfect main door lock involves more than color. Follow this checklist:

  1. Door Thickness: The DX1338 MB typically fits doors 35mm to 50mm (1-3/8″ to 2″). Measure your door’s edge thickness.

  2. Backset: This is the distance from the door edge to the center of the bore hole. Standard is 60mm or 70mm (2-3/8″ or 2-3/4″). Check your existing latch.

  3. Handing (Door Swing): Is your door left-handed or right-handed? The lever angle must match the swing for ergonomic use. Most quality levers, including the DX series, are reversible—verify before buying.

  4. Security Level: For a main door, avoid privacy sets (bathroom locks). Choose a keyed entry function with a Grade 2 (heavy residential) or Grade 1 (commercial) ANSI rating. Look for a hardened steel anti-drill plate and anti-pick pins.

  5. Finish Consistency: “MB” stands for matte black. Ensure other hardware (hinges, kickplate, mailbox) matches or complements (e.g., oil-rubbed bronze or satin nickel).

  6. Fire Rating: If your door is a fire-rated assembly, the lever handle must be UL-listed. Check product specifications.

Pro tip: For the DX1338 MB, confirm the spindle length and if a split spindle (for spring cages) is included for narrow stile doors.

Conclusion

Your main door lock is the silent guardian of your space. The Dufix DX1338 MB black lever handle elevates that guardianship with striking matte black style, industrial-grade stainless steel construction, and the ergonomic safety of lever operation. Whether you’re a homeowner looking for “Lock and Leave” lockset to boost curb appeal or a facility manager specifying durable hardware, this black lever handle delivers on both form and function.

Don’t settle for flimsy, shiny handles that show every fingerprint. Upgrade to the black lever handle DX1338 MB – where security meets contemporary elegance. Visit a certified Dufix dealer or Artdoors’ showroom to feel the quality firsthand.

Door Lock Black Colour Lock

Frequently Asked Questions (FAQ)

Q1: Is the DX1338 MB black lever handle suitable for outdoor main doors?
A: Yes, provided the door has a weather seal and an overhang or awning. The stainless steel base and matte black coating resist UV and moisture. However, for direct rain exposure, consider adding a rain drip cap above the handle.

Q2: Can I install this black lever handle myself on a pre-bored door?
A: No, it requires to do some adjustment when doing the installation, suggest to hire a professional to take a look if necessary. If your door already has a standard 54mm bore hole and 25mm edge bore, you just need a screwdriver. Follow the included template. The adjustable latch (60/70mm backset) fits most standard doors. Installation takes about 20 minutes.

Q3: How do I maintain the matte black finish on my main door lock?
A: Clean weekly with a soft, dry microfiber cloth. For smudges, use mild soap and water—never abrasive cleaners, alcohol, or citrus solvents. Avoid lubricating the lever itself; instead, spray a Teflon-based lubricant into the cylinder and latch once a year.

Q4: What parts come inside the DX1338 MB box – does it include a mortise latch and cylinder?
A: No, the package does not include a mortise latch, cylinder lock, or door frame strike plate. You will receive only two levers (one for the interior side and one for the exterior side) , all necessary mounting screws, and a paper installation template. To complete a full replacement or new installation, you must extra purchase the mortise lock and cylinder lock separately. For the strike plate on the door frame, either reuse your existing one or buy a new compatible piece.