Round Deadbolt Lock DDLK022 series offers a practical security solution for residential and light commercial doors, combining stable mechanical performance with a clean circular rosette design. The lockset is available in both single cylinder and double cylinder configurations, allowing flexible selection based on security requirements and door environments. With a solid brass cylinder and precision-engineered internal structure, it ensures reliable locking performance and smooth operation over long-term use. The 70mm zinc alloy rosette provides a balanced visual proportion while maintaining structural strength, making it suitable for modern door hardware systems. Its adjustable backset and compatibility with standard door thickness ranges allow easy installation across various door types. Multiple surface finishes support consistent matching with different architectural styles and project specifications.

1. Two Cylinder Configurations

The DDLK022 series includes the DDLK022-A single-cylinder version and DDLK022-B double-cylinder version. Buyers can select a model according to door location, key operation, and the project hardware schedule. Both Round Deadbolt Lock models share a coordinated circular appearance, allowing different entrances to use the required locking configuration without creating visual inconsistency across the building.

2. 70mm Round Rosette

The zinc alloy rosette has a 70mm diameter and a rounded profile that coordinates with circular knobs, curved levers, and varied door styles. Its defined size allows designers to confirm the available mounting area and provides coverage around the standard lock preparation. The Round Deadbolt Lock suits new door packages, lock replacement work, and multi-door construction projects.

3. 60mm and 70mm Backsets

The tubular mechanism has an adjustable backset that changes between 2-3/8 inches and 2-3/4 inches, corresponding to 60mm and 70mm. Door manufacturers can set the mechanism according to the distance from the door edge to the bore center. This adjustment helps DDLK022 fit different prepared doors while reducing separate inventory codes for each backset.

4. Standard Door Thickness Range

The Round Deadbolt Lock fits doors from 1-3/8 to 1-3/4 inches thick, equal to approximately 35mm to 45mm. The range covers many residential wooden doors, apartment entry doors, and light metal doors. Project teams can check the door schedule before quotation and ordering to confirm suitable connector length, rosette alignment, and tubular mechanism installation.

5. Five Metal Finishes

DDLK022 finish options include satin stainless steel, antique brass, antique copper, polished brass, and US10B. A brass cylinder and keys are paired with the zinc alloy round rosette to suit contemporary, classic, and traditional hardware schemes. These finish choices help the Round Deadbolt Lock coordinate with knobs, levers, hinges, and selected door surfaces.

1. Villa Front and Rear Doors

Front, side, and rear doors of villas can use the Round Deadbolt Lock for separate deadbolt locking. Its 70mm circular rosette coordinates with round knobs and curved levers, while adjustable 60mm and 70mm backsets accommodate different preparations. Single- and double-cylinder versions can be specified individually according to the operating requirements of each entrance.

2. Apartment Unit Doors

Door thickness and backset dimensions may vary between apartment construction phases. DDLK022 fits doors from 35mm to 45mm and provides two adjustable backset positions. The consistent round rosette suits centralized installation across multiple units. Brass cylinders and keys also help property teams organize allocation, registration, and spare-key management by apartment number.

3. Guesthouse Room Entrances

Guest rooms, private suites, and management spaces can use DDLK022-A or DDLK022-B according to their key-operation requirements. Antique brass, antique copper, polished brass, and US10B finishes complement timber, traditional, or dark-colored doors. The tubular Round Deadbolt Lock works well for renovation projects and doors with standard pre-bored preparations.

4. Commercial Office Rooms

Small offices, record rooms, studios, and retail storage spaces can use DDLK022 for locking independent of the primary knob or lever. The 70mm rosette covers the standard mounting area, while two backset positions accommodate prepared doors. Buyers can allocate single- or double-cylinder models according to room access requirements and manage them within one project series.