Brand new, unused. Special Hardened Steel: The special alloy steel bar has a high surface hardness that can withstand 15T hydraulic shearing. You can feel secure implementing even the thickest steel materials, but ultimately they won't withstand a grinder. We've adopted a 5mm thick steel bar as a security measure to counter theft by silent attacks such as hydraulic cutters. Surface hardness is more important than the thickness of the steel material in a shearing machine. [Features of RinLock] While having high shear strength, it is lightweight at 1,325g. High-quality rivets are used in the link parts of the steel bar, achieving smooth operation and 2T tensile strength. Chain locks allow you to lock the planet while maintaining the freedom to lock the earth, and by connecting steel bars that are not connected, or seamless steel bars like U-locks, you can lock the planet while being lightweight and highly strong. RinLock is compact and easy to carry, and has excellent compatibility with chain locks and U-locks. High-Quality Key Cylinder: The pure copper cylinder is precisely machined and has excellent durability. Problems with outdoor bike keys, such as being unable to unlock the lock, occur constantly. To prevent such problems, it is important to use a high-quality cylinder.