Reliable access control starts with hardware that performs consistently across daily use and high-traffic conditions. The Double Sided Lock Door Knob offers a practical locking solution for both interior and light commercial applications, combining mechanical stability with a clean architectural appearance. This commercial lockset fits a wide range of door types including flush timber, wooden, aluminium, and steel doors, making it suitable for diverse installation environments. A solid stainless steel knob and rosette provide durability against wear, while the brass cylinder and matching brass keys ensure smooth key operation and dependable locking performance over time. Each set is supplied complete with latch, striking plate, fixing materials, and installation manual, enabling straightforward setup without additional sourcing.
| Product Model | DDLK003 |
| Cylinder + Keys | Brass |
| Knob | Stainless Steel |
| Rosette | Stainless Steel |
| Rosette Diameter | 65mm, 75mm |
| Finish | SSS, AB, AC, PB, US10B |
| Suitable For Door | Flush Timber / Wooden / Aluminium / Steel Doors |
| Mechanism Option | Tubular Type, Cylindrical Type |
| Door Thickness | 1-3/8" to 1-3/4" (35mm to 45mm) |
| Backset | Adjustable 2-3/8"(60mm),2-3/4"(70mm) |
| MOQ | 100PCS |
| Package | 1pc / poly bag, white box / color inner box, standard export carton |
| Sample Time | 5-7 working days |
| Production Lead Time | 30-35 days normally |
| Shipping Port | Jiangmen, China / Shenzhen, China |


D&D Hardware is a professional manufacturer and supplier of architectural door hardware and complete door opening solutions. With over 18 years of manufacturing experience and ISO 9001 certification, we serve global customers from our production base in China, delivering reliable hardware solutions for metal doors, wooden doors, and fire-rated doors.
Our product portfolio covers a full range of commercial and architectural hardware, including door hinges, door locks, lever handles, door closers, exit devices, door stoppers, door bolts, and related accessories. In addition to standard product lines, we offer flexible customization options to support specific project requirements, while ensuring each product meets the functional, safety, and durability demands of modern building applications across diverse environments.