Replace bedroom lock with GOAL cylindrical lock ULW-5E

"I want you to exchange your bedroom key."

He asked me to replace the existing key, and it seems to be a trouble in my family, but I'm not sure.

After confirming the request again, he said that he wanted to replace the bedroom key.Originally it had an old cylindrical lock, but the front part was also tattered.

I was saying that it was likely to be replaced several times in the future, so I made it robust with stepped metal fittings and replaced it with a new cylindrical lock ULW-5E.