A circular saw is provided with a disc and tooth holders mounted on the periphery of the disc, with each tooth holder having a pair of legs straddling the disc and fasteners such as bolts and nuts extending through the legs and discs for fastening the holder to the disc. A tooth head is provided with a shank in the form of a bolt which extends through a bore in the holder engaging the tooth head, and the shank and tooth head extend in a tangential axis with the periphery of the disc. Shoulders are provided on the body of the holder for abutting the tooth head.