One fit, 4-in-1, oscillating drywall blade, 1 piece, multi-tool, cut electrical box outlets, recessed lighting holes & a host of other diverse drywall related projects, 4 unique functionalities: dagger blade allows for detailed cuts, especially tight circular cuts, depth gauge increments reflect drywall thickness, & designed to monitor depth of cuts, piercing tips initiate the cut for a clean start, along with push/pull cut capabilities, shaver notches help remove excess drywall for a better fit, fits milwaukee, fein, bosch, makita, dewalt, rockwell, porter cable & more oscillating tools.