Technology:
- Steel laminates, lowest laminated is hardened
- Laminates individually treated for top corrosion protection
- Rivets concentrated in the outer laminates to protect the rivet heads from being chipped off
- Hardened shackle, double bolted, as of 40 mm made from special alloy
- Precision pin tumbler cylinder
- Self-locking: Locking without key by pushing down the shackle
- Made in Germany