The Edge Protector snaps onto the front of the sander and prevents the oscillating pad from damaging adjacent surfaces. For example, you can sand the inside of a cabinet without damaging the side walls. It also extends the life of the pad.
This is a replacement for the standard edge protector that is included with the Festool DTS 400 REQ Delta Orbital Sander & the Festool DTSC 400 Li Cordless Delta Orbital Sander.
