Fein-MultiMaster-Lever-System Published December 7, 2012 at 350 × 455 in Fein MultiMaster FMM250 and FMM250Q with Easy Tool Mount Fein’s QuickIN lever system (on the FM250Q) allows you to change the head accessories without any external tools. The QuickIN lever system on Fein’s FMM250Q and SuperCut enables tool-free attachment changes.