Proxxon 28510 12-Volt Rotary Tool Micromot 50/E Micromot standard 4/5-Inch (20mm) collar allows for easy use in drill stand MB140/S number 28606 and universal holder UH34 and with angle adapter WS90 Magnetic motor with keyless chuck provides for quiet and effortless, vibration free drive Tool works with all the industrial quality of drill; router engraving, cutting, sanding bits made by proxxon for a very useful tool