Given one of the highest ratings of any chain lock. Squire have been making padlocks since 1780 and the stronghold has been a flagship in the bicycle locking department. A high performance Sold Secure Gold rating means this lock will give you the peace of mind when locking up. A 50mm hardened solid steel closed shackle lock body means that this is an incredibly strong option for bicycle security. Electrophoretic Anti-corrosion finish means this wont be effect by the elements. A 10mm link diameter hardened alloy chain that is coated with a black sleeve gives you a lock distance of 900mm (the complete length of the chain) perfect for securing your bikes at home or work.- Sold Secure Bicycle Gold Lock & Chain Set- A high performance, high security lock and chain set.- Stronghold 50mm Hardened Solid Steel Closed Shackle Lock Body.- 10mm Hardened Boron Alloy Steel Shackle.- Electrophoretic Anti-corrosion finish.- 6 Pin Cylinder offering over 250,000 possible key differs.- Anti-drill protection.- Cen Grade 4 Padlock.- Comes complete with 10mm Link Diameter Hardened Alloy Steel Chain with Black Sleeve.