My husband loves this set.  He uses any time he needs a circular hole, all you need to use this set is a drill.  Most sets have other pieces you need to buy but not this one.  The set is sturdy, has a nice case, and seems like it will last a while.  Don't expect the circular pieces to stay white though, they seem to lose their paint rather quickly.  Think it would be better if they just didn't paint them but that doesn't matter to much husband either way.  A great set for many uses and certainly for more than just electricians.