6" Craftsman groover and dado cutter # 9- 3248 with 1/2" arbor. Used on vintage 8" Craftsman table saw. The set consists of two outer blades, two inner chippers and lots of paper shims with pre-drilled holes. The blades and chippers are clean without any traces of rust. Has not been used much- probably 2-3 times only. Made in USA by Craftsman.