Magnetic rules contain encapsulated button magnets and are suitable for fixing to machine slides, guillotine blades and sheet metal. Manufactured from hardened and tempered high quality British steel, they conform to BS 4372-1968 for accuracy. Etched from precise glass masters with satin chrome finish and blackened graduations for wear resistance and non glare viewing. Front side marked 64ths and 32nds: figured in inches. Reverse side marked 1.0mm and 0.5mm: figured in millimetres.