Superior DB4 Diamond Blade - All Purpose (Formerly DB).- All-purpose super-fast cutting discs are used on construction sites and in emergency services.- The disc segments are directly coated with diam more→onds in a vacuum process.- Dry and wet cutting.Applications:- Very good applications in various materials such as natural and artificial stone, concrete, reinforced concrete,.aggregate concrete, paving concrete, granite, quarry slabs, sandstone, bricks.- Metals:iron profiles, soft cast iron, tinplate, non-ferrous metals, ductile tubes.- Plastics, fiberglass, carbon fiber, wood, rubber, etc.