I use them for work where I use them to easily take cars apart. This set has the sizes and accessories I need to keep the number of tools I need to carry to a minimum. While I wouldn't use them for the big brand heavy duty tools, this set serves my needs well. No real problems so far. The small Allen keys that come with it don't cost much (no screwdrivers), but I don't use them anyway. If you want a lightweight screwdriver set this is a good value.