Molemab has been making grinding wheels in Italy since the early 60's and their quality is second to none. We stock these wheels for those grinders with a 5/8" arbor. These wheels are made of vitrified aluminum oxide material of medium hardness. These wheels are soft enough to remove material quickly, but hard enough to keep their shape. 3/16" thick wheel sharpens all 3/8" pitch (except low profile) and .404 pitch chainsaw chains.