• 12T Shear Resistant:  Lock plates made from a special hardened steel with heat treatment, able to withstand being sheared by a 12T hydraulic cutter. 
• Cylinder lock and head made from high-quality hardened steel and an enclosed design additional protection. 
• The lock combination wheel is made from an anti-rust zinc alloy that provides excellent cyclinder life in corrosive environments.
• High strength stainless steel rivets with 1.5 ton pulling capacity.
• 5mm thickness steel, with extra 3mm high quality environmental plastic coating to prevent scratching the paint of the bicycle.
• Unique upgraded patented bracket for easy access for left or right-handed cyclists.