This replacement carbide-tipped blade is for use on the Crain No. 545 Multi-Undercut Saw or No. 555 Multi-Undercut Saw. It is a 36 tooth approximately 5 ½” diameter blade designed to fully undercut an inside corner area using these Crain saws. For use in cutting wood base, moldings, door jambs, and drywall only. Not for use in cutting metal, masonry, ceramic tile, or stone. Net weight: 6 oz.