and of a size in the range of from about sae 12 to sae 50 or from about 0 028 to 0 0937 inches in diameter such particles may be formed of aluminum oxide steel glass sand stone carborundum or any other hard or abrasive material and is distributed in a single layer on the upper surface of the backing material after the grit has been deposited in this way the assembly is sprayed with molten metal and as illustrated in fig5 this is preferably accomplished by passing the material with the grit thereon beneath an electric arc spray mechanism the arc serves to bring the metal to a molten state and the air or gas jet serves to atomize and direct the molten globules of metal onto and into the layer of grit on the base material the gas pressure and amperage chosen for this purpose are such that the atomized molten metal will not displace or blow the grit particles about and will bond the grit particles in place prior to the final bonding operations the droplets of molten metal produced by the arc and gas jet upon contact with grit and or base material spreads and locks the grit in place on the base material the flow of metal locks the grit to the base material by spreading from the surface of the grit particle to adjoining grit particles and thru spaces between the particles to the base material as shown in fig6 this locking operation is of sufficient strength to allow the minimum displacement of the grit particles during the subsequent bonding operations which require much higher gas jet velocities in order to assure more.