250, 000 manufactured key differs: Highest protection against manipulation. Through hardened steel alloy shackle: Resists hacksaw attacks. Hardened steel alloy body: Optimum drill & pull resistance. Close shackle: For additional protection. 14 mm. Shackle: CEN grade 5 security. Re-key able mechanism: Allows additional locks to existing keys. Many more keyed alike suites available: Convenient high security. Outer Measurement: 79/94/39 (Size mm) Shackle Measurement: 22/22/14 (Size mm).