Insert Dimensions: Fits 4100/4000 series jobsite table saws 13-9/16" x 3-3/4" x 7/16" Made from high-density phenolic laminate with a bonded-melamine surface Compatible with Bosch table saw model 4000 and 4100 Includes leveling screws, side and end adjustment screws; rear safety tab; pre-cut blade bottom pocket Please check your Length x Width x Thickness of your current insert before ordering to ensure that you get the correct insert. Replace your factory table saw insert with a phenolic zero clearance insert. Zero Clearance inserts help prevent kickback and tear-out on your stock pieces when feeding through a table saw blade. By raising your blade up through the insert, you eliminate gaps between the side of the insert and the blade. This provides with much better stock support than with most factory inserts that come with the saw. This also prevents smaller stock pieces from falling into the opening that exists with factory inserts. Zero clearance inserts can be used with any type of standard saw blade (standard or thin kerf blades) and can also be used with dado blades. It is recommended that if you need an insert to accommodate both a standard saw blade and a dado blade, that you purchase two separate zero clearance inserts. Use one for your normal cuts and one for dado cuts. Insert color surfaces may vary depending on availability.