Introduction
Thank you for choosing the ROCKBROS Bike Anti-Theft Folding Lock. This manual provides essential information for the proper installation, operation, and maintenance of your new lock. Please read these instructions carefully before use to ensure optimal security and longevity of the product.
Product Overview
The ROCKBROS Folding Lock is designed for bicycle security, featuring a compact, foldable design for easy transport and storage. It consists of hardened steel links and a drill-resistant lock cylinder.
Components:
- Folding Lock Body
- Keys (typically 3)
- Mounting Bracket
- Mounting Straps/Screws

Image: The ROCKBROS Folding Lock in its compact, folded state, ready for storage or transport.

Image: The ROCKBROS Folding Lock fully extended, showing the individual hardened steel links.
Setup and Installation
The lock can be easily fixed to your bicycle's handlebar or seat post using the provided mounting bracket.
Mounting the Lock Bracket:
- Choose a Location: Select a suitable location on your bike frame, handlebar, or seat post that does not obstruct riding or other accessories. The seat post is a common and convenient location.
- Attach the Bracket: Use the provided straps or screws to securely fasten the mounting bracket to your chosen location. Ensure the bracket is tight and stable to prevent movement during cycling. A hex tool may be required for screw-based installations.
- Insert the Lock: Slide the folded lock into the mounting bracket until it clicks securely into place. Ensure it is firmly seated and does not rattle.

Image: The ROCKBROS Folding Lock securely mounted on a bicycle's seat post, demonstrating its compact storage.

Image: A visual guide illustrating the step-by-step process of installing the lock's mounting bracket onto a bicycle frame or seat post.
Operating Instructions
Locking Your Bicycle:
- Remove from Mount: Gently pull the lock out of its mounting bracket.
- Extend the Lock: Unfold the steel links to their full length.
- Secure Your Bike: Wrap the extended lock around your bicycle frame and a secure, immovable object (e.g., a bike rack, lamppost). Ensure the lock passes through a wheel and the frame for maximum security.
- Insert and Turn Key: Insert one of the provided keys into the lock cylinder. Push the locking mechanism together and turn the key to secure the lock. Remove the key and store it in a safe place.
Unlocking Your Bicycle:
- Insert Key: Insert the key into the lock cylinder.
- Turn Key: Turn the key to disengage the locking mechanism.
- Release and Fold: Separate the lock ends, unwrap the lock from your bike and the object, then fold the links back into their compact form.
- Store the Lock: Place the folded lock back into its mounting bracket on your bicycle.

Image: The ROCKBROS Folding Lock in active use, securing a bicycle to a stationary object for theft prevention.

Image: A person demonstrating the portability of the ROCKBROS Folding Lock by carrying it in a cycling jersey pocket.
Maintenance
- Lubrication: Periodically apply a small amount of graphite-based lubricant or a specialized lock lubricant to the keyhole and internal locking mechanism. This helps ensure smooth operation and prevents corrosion.
- Cleaning: Wipe down the lock body and links with a damp cloth to remove dirt and grime. Avoid harsh chemicals that could damage the vinyl coating or plastic components.
- Storage: When not in use, store the lock in a dry environment to prevent rust and prolong its lifespan.
Troubleshooting
- Key Not Turning/Stuck:
- Ensure the key is fully inserted and aligned correctly.
- Apply lock lubricant to the keyhole and try again.
- Check for any debris in the keyhole.
- Lock Mechanism Stiff:
- Lubricate the folding joints and the locking mechanism.
- Ensure no dirt or grit is impeding movement.
- Lock Not Securing in Mount:
- Verify the mounting bracket is installed correctly and tightly.
- Ensure the lock is fully folded and aligned with the bracket's slot.
Specifications
| Brand | ROCKBROS |
| Model | B00MN52JPY |
| Lock Type | Key Lock |
| Material | Acrylonitrile Butadiene Styrene (ABS), Alloy Steel, Vinyl |
| Lock Body Dimensions (Folded) | Approximately W7cm x H5cm |
| Locking Plate Length (Extended) | Approximately L58.5cm |
| Locking Plate Width | Approximately W1.8cm |
| Weight | Approximately 630g (including package) |
| Special Feature | Foldable, High Security, Drill Resistant Cylinder |

Image: Technical design sketch illustrating the internal and external components of the ROCKBROS Folding Lock.
Warranty and Support
ROCKBROS products are manufactured to high-quality standards. For specific warranty information, please refer to the product packaging or contact ROCKBROS customer support directly. Keep your purchase receipt as proof of purchase.
For technical assistance or inquiries, please visit the official ROCKBROS website or contact their customer service department.