A really good piece of kit for the modeler's tool box. Although I don't have the Proxxon router, the 3.2mm shaft bits fit my Dremel drill and home made modeler's router table. My daughter's dolls house is now going get all the custom made finishing touches such as mahogany skirting boards etc. Well recommended and excellent delivery service and by first class mail, arrived in less then 24 hours - brilliant!