It's fine as far as it goes. The cutters supplied are too big for most locks. They are an M10 thread and you would think that any similar mortiser would make their cutters with an M10 thread so I bought a 16mm dia cutter from Souber. But although the Souber mortiser looks virtually identical, it uses some sort of medieval thread of about 7.5mm. And I don't seem to be able to get hold of a 16mm dia cutter with an M10 thread.I shall probably find a suitable rod the same diameter as on my original mortiser and ask a friend with a workshop to run a tap of this medieval thread down into its end. If the Chinese company which made this advertised 16mm cutters, I would buy one but I can't find whether they do.Buy it if you are happy with oversized slots but you may have problems getting replacement cutters.