Good value core set, used it to put waste pipe and extractor pipe through the wall. If you're thinking about buying this, make sure you check that your SDS is powerful enough to turn a 110mm core drill. I found that the core drills werent really deep enough to go through cavity walls, was a pain having to run a core into it, chisel out the inner, run the core in again, etc. After a good hour of drilling the 110mm core is noticibly blunter than it was, next time I'd probably just hire a diamond core and matching drill.