Offered here is the Black and Decker Valve Seat Stone and Pilot Handbook. It is a 57 page manual. Has specifications such as Valve Seat angle, Pilot / Guide Size and proper part number of pilot to use, Valve seat Stone size to use. Cover engines up to 1975. Covers American Passenger Cars, Foreign Passenger Cars, Motorcycles, Small Gasoline Engines, and Diesel Engines. Black & Decker