Blackstone 10mm Chain Bike Lock – 130dB Alarm, 45In

Blackstone’s alarm chain bike lock combines a heavy duty 10mm chain with a built-in alarm to help protect your bike or e-bike when you park. The six-sided hardened manganese steel chain is designed to resist cutting, while the 45.5Inches length gives you flexible locking options around racks, posts or other fixed objects for everyday use.

Key features:

• Heavy duty 10mm chain made from six-sided hardened manganese steel for strong resistance against cutting and prying.

• Integrated loud alarm system adds an audible layer of deterrence whenever someone tampers with your locked bike.

• 45.5Inches chain length provides versatile reach to secure your frame and wheel to bike racks, poles or other solid anchors.

• Suitable for e-bikes, electric bikes, scooters and motorcycles where you need compact but serious security.

• Independently tested and approved chain lock construction helps support consistent quality and performance.

• Built-in key replacement support helps you obtain new keys if all originals are lost.

• Package includes 1 alarm chain lock, 1 CR2 lithium battery, 3 keys and 1 bag for convenient storage.

Whether you’re locking up for a daily commute, a quick stop in town or overnight on the street, this Blackstone alarm chain lock delivers a solid mix of physical strength and loud alarm deterrence so you can walk away with more confidence.