Used for solid wood edge banding with plywood, the first bit in this two piece set is used to cut a groove into the edge of your plywood workpiece allowing for the second bit to cut your solid wood to fit into the groove.
Having used typical shop vacs from both Shopvac and Ridgid I could not believe the difference in performance, efficiency, noise level, features and dust extraction capability of the Festool CT MIDI I. After attaching the MIDI to my Milwaukee track saw, I couldn’t see any dust anywhere which was quite a departure from what I have been accustomed to. Yes, the Festool is pricey however if you value your lungs and you insist on highest level of dust extraction capability, then it is worth every single penny spent to buy one.