These are bigger then I thought. They feel very well made and sturdy. One really nice thing is the mechanism used to keep it closed and secured. You have to twirst it up like a screw to secure it. I feel totally confident this will keep my belongings where they should be with no possibility of lose. I have used one on a backpack and I can say there is no way someone would be able to take it off without a lot of work and me noticing what is going on. Brings securily to mind. Awesome as well as there are 3!