SECURITY MEANING AND INTRODUCTION
1. Steel shackle: Chromium plated and hardend, anti-rust, anti-sawing and anti-cutting.
2. Steel ball: Resist strong pull
3. Brass flake: Alne with high density by computer. The change of alinement
Will outnumber and equal 20000 times.

4. Cap of cylinder: Anti-dust, anti-drilling, anti-pulling
5. Key: Brass material, nickel plated, two-sides. Double key-ways. The rate of alike key can fall to the lowest level of this trade(under and equal0.05%.