The insert is identical to the one that comes with the saw, sans slot for the blade. My only complaint/suggestion is the lack of instructions, something like: 1) This insert is cast aluminum and can be cut using a carbide tipped blade, 2) Remove the riving knife, 3) Secure the riving knife end to the table with some tape, the other is held by a screw, to prevent the insert from jumping out of place, 4) With the saw on, SLOWLY raise the blade, cutting the slot in the insert, to its highest point.