The ABUS 92 Monoblock shutter padlocks have a solid brass body encased in hardened steel jacket and a through hardened steel alloy shackle which rotates when attacked. 5 Pin precision cylinder with anti-pick mushroom pins and rustfree components. A hardened steel pin protects the narrow side of the lock against sawing and the deadlock mechanism requires a key to lock. NANO PROTECT™ Chrome Plating, Hardened steel and through hardened steel alloy shackles get the most effective protection available, where smallest nano particles close the smallest gaps found in the normal chrome plating \'making rusty shackles a thing of the past\' 1,000 hours salt bath test, the equivalent of 40 years in a harsh environment proves the durability of the NANO PROTECT™ process.