Not sure about other reviews but the socket head set screws were good and the fit and finish of the entire MT3 to 3 Weldon/4" adapter was Excellent I use it in a lathe tailstock now, so I can't tell you how much runout there is, but everything else is there.It has an internal relief spring that will take 2" deep knives and is strong enough to take the Eject ball perfectly Good deal!