Don´t know about the safety of locks, but the ordering process promises a real well fitting belt - if only china wasn´t so for away.
After you send your measurements, the verdor will print a "sample belt" from resin and send this to you. You put it on, note what needs adjustment and send this info back. If neccessary you get another resin belt for trial fitting, until the belt fits as expected. Then you order the final, stainless steel belt.
This process promises a belt that really fits perfect.
Of course there remain some problems due to the Chinese origin:
1.) Nobody knows the verdor and nobody knows if he canbe trusted.
2.) The final belt is not adjustable so you better keep your weight!!
3.) In the end a belt from Latowski or another european seller may even be cheaper, because taxes and postage costs will and to the price of the male belt, which is around $ 1200. Don´t know the price of a female version.
It´s a pity because the looks and the probably perfect fit are really promising.....