10mm hexagon hardened steel chain with a protective sleeve. Steel casting technology ensures a seamless lock body with no welding, and a stainless steel key barrel adds extra strength.

Features:

• 150cm in length.
• Chain locks directly into the lock body.
• Auto alarm system.
• Alarm function on/off selection.
• Built-in 120dB alarm system.
• Alarm protected by zinc alloy body.
• 3 keys supplied.
• CR2 lithium battery.