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- Provides maximum security for valuables.
- Pin-tumbler locking mechanisms make padlocks harder for thieves to pick.
- Tumblers with five or more pins provide the best security, while four pin is the next best.
- Hardened solid steel and steel alloys make better locks and shackles.
- Solid extruded brass padlocks are more resistant to rust than steel, but can be damaged more easily.