Newer Craftsman/Rigid Zero Clearance Insert (After 1988) by Peachtree Woodworking PW953
Table saw blade insert improves the safety and efficiency of your table saw. The insert closes the large factory gap which makes your saw safer and can improve your dust collection. The insert is blank so you can custom fit the blade slot by passing your blade up through the insert. Buy two, one for your regular blade and one for your dado blade.