Our master lap made with the aluminum and plastic materials,It is a lightweight backing used in conjunction with diamond flat laps and disc. The standard sized backing is available to support both 6 and 8 standard discs
The ground flat and parallel laps ,Its used as a base plate for other laps. 1/4 thick and are not charged with abrasive."
The Aluminum master lap is only a machine accessories. the material is 100% aluminum, no diamond coated on the surface.