I purchased these to go in my rolling box tool set. They dropped right in the drawer in some extra space next to a wrench set. The plastic caddy appears to be stronger, and holds the hex keys better than the other caddies with a hinge. A ball end enables them to be used to work at an angle, and the other end can be used the regular way. These are great to use while working on something with metric fasteners.
Im not sure if i just got a bad batch but these tools where crappy. They where extreemly hard to take out. They had many scratches on their poor paint job. The small ones bent easy. Just puting them back in to take them back was a hassle.
I was disappointed to see that they were made in China. It is getting really hard to find tools that are made in the USA.