Hole Pro X-425 Twin Blade Hole Saw Cutter Adjusts to cut all size holes between 1-7/8" to 17" Cuts Plywood (Max dia for PLYWOOD is 9") Sheetrock Plaster Fiberglass OSB Plastic MDF Hardie Board Adjustable twin blade hole cutter for cutting 1 7/8" to 17" holes in ceilings, walls and floors Depth of cut: 3/16" (5mm) - 1 " (25mm) cut from one side, 2" (50mm) cut from 2 sides Cuts plywood (max dia 9"), sheetrock, plaster, MDF, ceiling tiles, fiberglass, etc 5 year warranty against defects Dust Shield size - 19" Outside Diameter - 1/2" drill chuck needed