ONGUARD Link Plate Lock K9 (ONG-8115) — folding bike lock, hardened steel links

ONGUARD Link Plate Lock K9 (ONG-8115) is a folding bike lock built from hardened steel link plates joined by articulated rivets and operated with a keyed cylinder. The compact design folds into a compact shape for transport and unfolds to secure a bicycle to fixed objects such as racks, posts or railings. The construction focuses on resistance to cutting and leverage while maintaining portability for daily urban use.

Advantages

The hardened steel link plates and articulated joints reduce exposed soft points, improving resistance to common hand tools. The keyed cylinder provides reliable locking and can be replaced or serviced if needed. Its folding profile makes it easier to carry on commutes compared with equivalent-length chain locks, and the moderate weight balances packing convenience with security. The slim folded footprint fits many frame-mounted carriers or saddle bags.

Suitable for

• Securing commuter and urban bicycles during short to medium duration stops
• Locking frames and wheels to bike racks, posts or metal railings
• Use where a compact, transportable lock is preferred over rigid U-locks or long chains

Key specifications

• Lock type: folding link plate lock with articulated joints
• Material: hardened steel link plates
• Locking mechanism: keyed cylinder
• Transport form: compact folded profile for mounting or storage
• Intended use: outdoor bicycle security for urban environments

How to use

Unfold the lock to its extended position and loop it through the bicycle frame and an immovable object, such as a rack or post. If possible, include the rear wheel within the folded links or use the lock alongside a secondary cable to secure both wheels. Insert the key and turn the cylinder to lock; remove the key and fold the lock back into its compact shape for transport. Inspect the cylinder and link joints periodically and keep the locking surfaces free of dirt to ensure smooth operation.

Usage recommendations

For improved security, lock the bike through the frame and at least one wheel, choose well-lit and populated locations for parking, and combine the folding link lock with a cable or secondary lock when leaving a bicycle for extended periods.