Hard metal cutting inserts for power-operated cutting and drilling tools, especially alloys containing tungsten carbide, chromium carbide and cobalt for brazing and welding on cutting and drilling tools; cutting inserts for power-operated tools, namely, planers, milling tools, circular tools, circular saws, drilling tools; metal blanks and metal profiled blanks for the further manufacture of machine tools, milling tools and power tools, namely, saw tips, routers, drillbits, and connecting rods