Quick Summary
The ROCKBROS square chain lock is listed for bicycles and electric scooters. It uses a handcuff-style design with connecting plates and a sleeved chain, and is described as fitting objects under 54 mm in diameter. Check the reach and fit of the complete lock in your intended setup before relying on it.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Lock style | Handcuff-style connecting plates joined by a chain. Consider whether this shape works with the parts you plan to secure and your chosen anchor. |
| Listed fit | Described for objects under 54 mm in diameter. Check the dimensions of the intended object and how the lock sits around it. |
| Weight | 502 g without keys, a useful factor when deciding what to carry. |
| Materials | The chain and plates are described as A3 chrome-plated steel, with stainless steel rivets. The chain has a polypropylene sleeve, and the connecting plates have a soft PR covering. The lock body has an ABS housing and zinc alloy core. |
| Keys | Two keys are described, made of copper with nylon covers. |
What to Compare Before Buying
- Anchor fit: Measure the object you intend to lock to and check it against the stated under-54-mm fit.
- Reach and lock-up: Confirm the chain and connecting plates can reach around both the anchor and the bicycle or scooter parts you want to secure. The listed fit diameter alone does not establish that the complete setup will work.
- Security needs: No security rating or resistance test is specified. If a particular rating matters for your use, confirm it for the exact lock before relying on it.
- Carrying weight: The lock weighs 502 g before the keys are added.
What Is Included
The listing describes a lock-only configuration with two keys and one item. It does not specify a separate mounting accessory.
Before You Decide
Check the anchor’s dimensions, the lock’s reach around your intended setup, and whether the stated security information meets your needs.
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