Original Iwasaw 7-1/4" x 24T Saw Blades 5/8" Arbor. Made by Iwasaw, the former manufacturer of the Marathon circular saw blade from Irwin. This is a tighter grain carbide lasts longer, plus stays sharper cut after cut. These measure 7-1/4" x 24T. These have a 5/8" diamond knockout arbor.Vents helps blades run cooler. Individually Carded.