The Bulldog Bike Lock System can be secured in two ways. Firstly, use the supplied recessed cup to fit onto Bulldog Super Lock Bolt for use as a portable secure loop to wrap around lamp posts and poles. Secondly, use the ground tube supplied with the kit to offer a permanent anchor position within the garage, in the drive or workshop.
The alloy steel chain is case hardened to 750-800 VPN (60 - 62 Rockwell) to a minimum depth 0.04 inch and has a ductile core hardness of 350 VPN which is sufficient to support case hardening without being brittle. The chain link diameter is 13mm, with the end links being16mm diameter. This chain is not standard mild steel! The chain is highly resistant to cropping and cannot be bolt cropped by hand. The chain has a special pear shaped link at one end which enables the facility to create a noose and extend the reach of the chain - very handy indeed. It is supplied with a bright red woven fabric sleeving for high visibility and protection.
The Bulldog Bike Lock System uses the 25mm thick case hardened Bulldog Super Lock Bolt (not a padlock) with over one million possible key combinations. There are no protruding parts when the ground anchor is not in use- the ground tube is completely flush fitting when concreted into the ground. This item is British manufactured and sold with Bulldog 5 year Guarantee.