The American Lock A2010 Hidden Shackle Padlock offers unmatched security with a 2-7/8-inch (73mm) case-hardened steel body, designed to resist forced attacks like drilling and sawing. Its 6-pin rekeyable cylinder provides superior pick resistance and allows for tens of thousands of key changes. The flat back design is compatible with high-security A801 or A802 systems, making it a versatile choice for tough applications.