Musclechuck™ have invented and developed a totally new high speed quick change router chuck, it is called the 'Musclechuck™ assembly' and when you examine the specifications of this new chuck, you will understand why they chose that name. The Musclechuck™ range fits a wide variety of plunge and fixed base routers including AUKTools, Bosh, Dewalt, Festool, Hitachi, Makita, Trend and Triton.