For hand touch-up of tungsten carbide and high speed steel cutting tools. Next to diamond in hardness, yet less expensive than diamond tools and lasts far longer. Sintered boron carbide grains are suspended in a tough resilient matrix which resists grain pull-out and premature separation. Shapes and removes metal rapidly and cleanly. Best for touch-up of Tungsten Carbide and HSS tools already set up in machine tools. No need to disturb setup. One of the few honing tools you can really bear down on without fear of breakage. Generous sized 1.6" Long stones. Cemented into sturdy 7" long handle with a 2X magnifier. Glaze easily cleaned off with an ordinary pencil eraser.
