A set of 3 Zero Clearance Insert Compatible with Dewalt Sliding Miter Saws DHS780, DHS790, DWS779, DWS780 and DWS782. MATERIAL USED: MDF. ***Do not order for any other compound miter saws models. ***For additional models, check our plate under B09TX1PKKH.***IF YOU WORK IN A HIGH HUMIDITY ENVIRONMENT, WE RECOMMEND ADDING A LIGHT COAT OF DANISH OIL TO THE UNFINISHED SIDE TO PREVENT ANY POTENTIAL WARPING. ZERO CLEARANCE INSERTS ARE CALIBRATED TO A SPECIFIC SAW, A SPECIFIC BLADE, AND A SPECIFIC BEVEL ANGLE. THEY CAN ONLY BE USED ON CUTS WHERE THOSE PARAMETERS ARE MET. FOR EXAMPLE, ONCE AN INSERT IS MADE FOR A STRAIGHT-ON 90° CUT, IT CAN'T BE USED ON OTHER CUTS. IF YOU NEED TO MAKE A 45° BEVEL CUT, YOU CAN'T USE YOUR 90° CUT INSERT. YOU MUST HAVE A 45° INSERT, OR SWAP IN THE ORIGINAL THROAT INSERT. EACH ZERO CLEARANCE INSERT IS GOOD FOR ONLY ONE SPECIFIC BEVEL ANGLE.