An example of a key adopted by the Hashimoto method that meets needs.

When adopting a "three-point latch fastening device" for large gates.

Even for heavy gates, there are limits to the locks that can be used for long-term operation. 1. To prevent the heavy gate from moving due to wind or other influences, there is a bolt-type fixing device on the side of the gate post when unlocking. A padlock or similar can be used to secure it, allowing the gate to be opened. 2. To prevent unauthorized access, lock the bolt-type fixing device located on the inside of the opposite gate post. This makes it difficult to unlock from the outside. 3. The last person to exit at night or similar times should close the gate and lock it with the bolt-type fixing device on the outside of the gate post. The photo shows a typical padlock, but you can freely change it considering strength and security. With these three fixed devices and one padlock, locking can be adapted to the situation. For enhanced security, consider changing the padlock, installing security cameras, or partnering with a security company.

Gates, walls and fences