(under subclass 663) Device which consists of a relatively thin, generally flat, member having work-contacting (cutting) portion or portions along its periphery, such portion or portions being symmetrically arranged with respect to the geometric center.
(1) Note. Included in this subclass are a disc-type tool having a circular periphery, a tool having a serrated or saw toothed periphery, and a tool having a plurality of equiangularly spaced cutting lobes.
