6-Tooth, Carbide Tipped (10,000 rpm max) Kerf: .155 to .160, 7/8-inch center hole Blade can be re-sharpened to save replacement costs 7/8-inch arbor hole and four-inch diameter blade for powerful, rapid results Affixes on and detaches with minimal effort This is an O.E.M. authorized part. Fits various Porter Cable mode