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Your cart is empty.Blackstone chain lock is an ultra-strong used independently approved 10mm metal chain with hardened steel construction. As well as being an extremely secure lock, it has a built-in alarm triggered by movement sensors. There are two ways to lock, one is to lock with alarm, and the other is to lock without alarm. This Heavy Duty Chain uses a special anti-corrosion coating which makes it ideal for outdoor use; it also features a nylon sleeve against scratches to bicycle, motorcycle surfaces. Blackstone Security Alarm Chain Features Six-sided shaped links, much more effective against attacks from bolt cutters, saws, hammers, and chisels. It passed the Golden Bicycle Test approval, which stands for the best quality.
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