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Double Hook Sliding Door Lock - High-Security Sliding Door Lockset (DDML031-B)

Product Overview

D&D HARDWARE’s Double Hook Sliding Door Lock (Model: DDML031-B) is a specialized door lock engineered for sliding doors, delivering dual-point security via its double-hook design—ideal for residential, commercial, and hospitality spaces. Crafted with SUS304 stainless steel forends and strike plates, plus high-strength steel hook bolts, this lockset resists forced entry while maintaining sleek aesthetics. It seamlessly integrates with D&D’s door handles, door closers, and door accessories, forming a cohesive door hardware system. With flexible backset options (40mm/50mm) and multiple finishes, it suits sliding doors in apartments, villas, hotels, and office buildings, balancing robust security with design versatility for global buyers.

Double Hook Sliding Door Lock - Technical Specifications

• Model Number: DDML031-B
• Brand: D&D HARDWARE
• Material Composition: - Forend & Strike Plate: SUS304 Stainless Steel (corrosion-resistant) - Hook Bolt: High-Strength Steel (hardness ≥ HRC 45, anti-bend/break)
• Backset Options: 40mm, 50mm (compatible with sliding door thicknesses: 30–50mm)
• Forend & Strike Plate Design: Square shape (matches modern、industrial design styles)
• Finish Options: SSS (Satin Stainless Steel), PSS (Polished Stainless Steel), PVD (Matte Black/Bronze), PB (Polished Brass), AC (Antique Copper)
• Security Level: Dual-hook locking (anti-pry, anti-forced entry; withstands 800N pull force on hooks)
• Operating Temperature: -20°C to 80°C (suitable for indoor/outdoor sliding doors)
• Warranty: 5 Years Mechanical Warranty

Double Hook Sliding Door Lock - Product Images and Videos

 

Double Hook Sliding Door Lock - Product Features & Advantages

• Double-Hook Dual-Point Security: Two steel hooks engage with the strike plate simultaneously, creating a anti-pry、anti-forced entry barrier—withstands 800N pull force (3x stronger than single-bolt sliding door locks). Ideal for apartment balconies、villa patio doors, and hotel sliding glass doors, preventing unauthorized lifting or prying.
• SUS304 Stainless Steel Durability: Forends and strike plates are crafted from food-grade SUS304, resisting rust、corrosion, and scratches—passing 72-hour salt spray tests (no oxidation). Suitable for humid environments (e.g., bathroom sliding doors)、coastal villas, and outdoor sliding entries, with a 15+ year service life.
• Square Design & Versatile Finishes: The square forend/strike plate complements modern、industrial、and contemporary interiors; finishes like PVD black (matches black door handles)、SSS (blends with stainless steel door stops)、and PB (pairs with traditional brass door hardware) ensure design cohesion.
• Flexible Backset for Universal Fit: 40mm/50mm backset options accommodate most standard sliding door profiles (30–50mm thickness), eliminating the need for custom door modification. Reduces installation time by 30% for contractors working on bulk projects (e.g., mall retail units、office building partitions).
• Seamless Integration with D&D Door Systems: Compatible with D&D’s sliding door handles (matching finish and spindle size)、door closers (for automatic sliding doors)、and door seals (enhancing insulation/security). Standard mounting holes align with industry norms, enabling easy retrofits or new builds.
• Quiet Operation & Low Maintenance: Hook bolts feature nylon buffers that reduce metal-on-metal contact, ensuring silent locking/unlocking (≤25dB)—critical for bedroom sliding doors、home offices, and hospital patient rooms. Requires only annual lubrication (included silicone oil) to maintain smooth performance.

Double Hook Sliding Door Lock - Installation & Usage Steps

1. Pre-Installation Preparation: - Confirm sliding door thickness (30–50mm) and select matching backset (40mm for thin doors, 50mm for thick doors). - Gather tools: Drill (3mm/5mm bits), screwdriver, tape measure, pencil, level, and chisel (for strike plate recess). - Check compatibility with D&D’s sliding door handle (ensure spindle size matches lock’s follower).
2. Mark & Install Lock Body: - On the sliding door’s edge, mark the lock body position using the included template (align with backset). - Drill pilot holes for the lock body screws, then secure the lock body with provided SUS304 screws (tighten to 6–8 ft-lbs torque). - Test the hook bolts: Turn the lock cylinder to extend/retract hooks—ensure smooth movement without jamming.
3. Install Strike Plate: - Close the sliding door, mark the strike plate position on the door frame (align with extended hooks). - Chisel a shallow recess (depth = strike plate thickness) to ensure flush installation. - Secure the strike plate to the frame with screws (use longer screws for solid wood frames to enhance pull resistance).
4. Install Door Handle & Test: - Attach D&D’s sliding door handle to the lock’s follower (align spindle with lock’s internal mechanism). - Secure the handle with set screws; test locking/unlocking with the key (hooks should fully engage the strike plate). - Slide the door back/forth to confirm no friction between the lock and frame; adjust strike plate if needed.
5. Usage & Maintenance Tips: - To lock: Close the sliding door, insert the key, and turn 90° clockwise (hooks extend into strike plate). - To unlock: Turn the key 90° counterclockwise (hooks retract); slide the door open. - Every 12 months: Apply 1–2 drops of included silicone oil to the hook bolts and cylinder for smooth operation.

Double Hook Sliding Door Lock - Application Scenarios

The DDML031-B Double Hook Sliding Door Lock excels in sliding door applications requiring security, durability, and design flexibility:

• Residential (Apartments, Villas, Farmhouses): - Use Case: Balcony sliding glass doors, bedroom wardrobe sliding doors, living room patio doors. - Value: Double-hook security prevents break-ins; SUS304 resists bathroom humidity/coastal salt; finishes match cabinet handles for cohesive home decor.
• Hospitality (Hotels, Resorts, Boutique Inns): - Use Case: Guest room sliding balcony doors, dining area sliding partitions, poolside sliding doors. - Value: Silent operation avoids disturbing guests; anti-forced entry design protects guest safety; PVD finishes match hotel door hardware (e.g., door closers、panic hardware for public areas).
• Commercial (Office Buildings, Malls, Retail Stores): - Use Case: Office pantry sliding doors, mall storefront sliding glass doors, retail fitting room sliding doors. - Value: Flexible backset fits diverse commercial door profiles; high-strength hooks resist tampering; compatible with smart lock cylinders (for keyless access in co-working spaces).
• Institutional (Hospitals, Schools, Nursing Homes): - Use Case: Hospital patient room sliding doors, school classroom storage sliding doors, nursing home balcony sliding doors. - Value: SUS304 meets hygiene standards (easy to clean); silent operation supports calm environments; anti-pry design protects vulnerable users.

Value for Buyers: - Architects/Designers: Achieve security without sacrificing aesthetics; versatile finishes match door hardware palettes (e.g., PVD black with black door stops). - Contractors: Save time with universal backset/fast installation; reduce callbacks via 5-year warranty; seamless integration with D&D’s door handles/closers. - Facility Managers: Low maintenance cuts long-term costs; SUS304 durability resists wear in high-traffic areas; anti-forced entry design lowers security risks. - Homeowners: Enjoy peace of mind with dual-hook security; silent operation enhances living comfort; durable materials avoid frequent lock replacements.

Double Hook Sliding Door Lock - Customization Options

D&D offers tailored solutions for DDML031-B to meet project-specific sliding door needs:

• Material Upgrades: - SUS316 Stainless Steel: Enhanced corrosion resistance for coastal villas、marine hotels (1000-hour salt spray test, no rust). MOQ: 500 units. - Solid Brass Forends: Premium option for luxury hotels、heritage villas (hand-polished finish, develops unique patina). MOQ: 300 units.
• Finish & Design Customization: - RAL/Pantone Color Matching: Brand-specific hues (e.g., mall chain colors、corporate branding). MOQ: 300 units. - Custom Plate Shapes: Round、rectangular forends (for traditional、European sliding doors). MOQ: 1000 units. - Dual-Tone Finishes: SSS hooks + PVD black forends (matches modern office door hardware). MOQ: 1000 units.
• Function & Size Customization: - Extended Backset: 60mm、70mm for extra-thick sliding doors (e.g., villa security sliding doors、industrial workshop doors). MOQ: 1000 units. - Thumbturn Cylinder: Internal thumbturn for bathroom、bedroom sliding doors (no key needed for internal unlocking). MOQ: 500 units. - Smart Lock Integration: Pre-drilled for D&D’s smart lock cylinders (Bluetooth、NFC、RFID) for keyless access. MOQ: 1000 units.
• OEM/ODM Services: - Private Label: Custom logos on forends、packaging (for hotel chains、regional door hardware distributors). MOQ: 2000 units. - Custom Lock Body Design: Modified hook length/angle for non-standard sliding door tracks (e.g., barn door hardware compatibility). MOQ: 3000 units.

Double Hook Sliding Door Lock - Production Process & Quality Control

D&D’s production ensures security、durability, and precision for every DDML031-B lock:

1. Material Sourcing & Testing: - Select SUS304/SUS316 stainless steel (for forends)、high-strength steel (for hooks) from SGS-verified suppliers. - Test materials via XRF (composition verification)、salt spray (corrosion resistance)、tensile strength (hook durability)—reject non-compliant batches.
2. Precision Machining: - Forends/strike plates: CNC-machined to square shape (tolerance ±0.03mm); polished to 320-grit (SSS) or 1200-grit (PSS); PVD coating applied via vacuum deposition (2–3μm thickness, adhesion tested via tape pull). - Hook bolts: Heat-treated to HRC 45–50 (hardness test); precision-ground for smooth movement; nylon buffers installed via ultrasonic welding.
3. Assembly & Calibration: - Manually assemble lock components (body、hooks、cylinder、follower) in cleanrooms to avoid dust ingress. - Calibrate hook extension (12±1mm)、spring force (6±0.5N) to ensure consistent locking performance; test key operation 15 times per lock.
4. Security & Performance Testing: - Security Tests: Pull force test (800N for 5 minutes, no hook deformation); anti-pry test (10 minutes with professional tools, no entry). - Durability Test: 50,000-cycle locking/unlocking (simulates 8-year use); no component failure or increased friction. - Environmental Test: IP54 dust/water test (24 hours); no internal corrosion or function loss.
5. Packaging & Final Inspection: - Qualified locks are packed in anti-scratch PE bags (inside color/white boxes) with screws、installation template、silicone oil (for maintenance). - Randomly inspect 5% of each batch for finish uniformity、hook alignment、key operation—reject batches with ≥1% defect rate.