1. Product Overview
The BESTTEN Keyed Entry Door Knob is designed for entrance doors, offering security and privacy. It features an all-metal construction with a matte black finish, ensuring durability and a modern aesthetic. This standard ball-style knob is suitable for various door types.
Key Features:
- All metal construction for enhanced durability.
- Matte Black finish.
- Adjustable latch for 2-3/8'' to 2-3/4'' (60-70mm) backset.
- Compatible with door thickness from 1-3/8'' to 1-3/4'' (35-45mm).
- Includes 3 keys per set.

Figure 1: BESTTEN Keyed Entry Door Knob (Matte Black) installed on a door.
2. Package Contents
Verify that all components are present before beginning installation.
- Door Knobs (Interior and Exterior)
- Latch Mechanism
- Strike Plate
- Dust Box
- Machine Screws (preinstalled in handle)
- Latch Screws
- Keys (3 per set)

Figure 2: All components included in the package.
3. Specifications
| Feature | Detail |
|---|---|
| Brand | BESTTEN |
| Model Number | DK1-ET-BK |
| Material | Metal (Brass handle, Stainless Steel metal type) |
| Color | Matte Black |
| Lock Type | Key Lock |
| Backset | Adjustable 2-3/8'' to 2-3/4'' (60-70mm) |
| Door Thickness | 1-3/8'' to 1-3/4'' (35-45mm) |
| Product Dimensions | 1.77"L x 1.38"W |
| Item Weight | 0.88 Pounds (14.1 ounces) |

Figure 3: Product dimensions and compatibility.
4. Installation
This door knob is designed for easy installation. A long No.2 Phillips screwdriver is typically the only tool required.
Important Pre-Installation Steps:
- Remove Preinstalled Screws: The machine screws come preinstalled in the handle. Remove them before starting the installation process.
- Keyhole Orientation: During installation, ensure the keyhole on the exterior knob is oriented correctly (key in the 'as shown' position) to prevent the key from getting stuck.
- Lock Tailpiece Alignment: Make sure the lock tailpiece and the thumb-turn knob are at the same level. Insert the lock tailpiece into the slot behind the thumb-turn knob.

Figure 4: Key installation tips.
Installation Video:
Video 1: Installation guide for the BESTTEN Keyed Entry Door Knob (Satin Nickel version shown, process is identical for Matte Black).
5. Operation
The keyed entry door knob provides security and privacy for your door.
Locking and Unlocking:
- From the Exterior: Insert one of the provided keys into the keyhole and turn to lock or unlock the mechanism.
- From the Interior: Use the thumb-turn button on the interior knob to lock or unlock the door.

Figure 5: Exterior (key) and Interior (thumb-turn) locking mechanisms.
6. Maintenance
Proper maintenance ensures the longevity and smooth operation of your door knob.
- Cleaning: Wipe the knob with a soft, damp cloth. Avoid abrasive cleaners or solvents that may damage the matte black finish.
- Lubrication: Periodically apply a small amount of graphite lubricant to the keyhole and latch mechanism to ensure smooth operation. Do not use oil-based lubricants as they can attract dirt.
- Tightening Screws: Check and tighten mounting screws periodically to prevent loosening and ensure secure installation.
7. Troubleshooting
If you encounter issues with your door knob, refer to the following common solutions:
- Knob is Loose: Tighten the machine screws that secure the knobs to the door. Ensure they are fully engaged.
- Key is Stuck or Hard to Turn: Apply graphite lubricant to the keyhole. Ensure the key is fully inserted and the keyhole is correctly aligned (refer to installation section).
- Latch Does Not Engage Fully: Check the alignment of the strike plate on the door frame. Adjust if necessary to ensure the latch bolt can fully extend into the strike plate opening.
- Door Does Not Close Properly: Verify that the door frame is not warped and that the strike plate is correctly positioned and secured.
8. Warranty and Support
BESTTEN provides a 5-year mechanical and finish warranty for this product, covering defects in materials and workmanship under normal use.
For further assistance, technical support, or warranty claims, please contact BESTTEN customer service through their official website or the retailer where the product was purchased.
Visit the official BESTTEN Store for more information: BESTTEN Store





