... cemented carbide at 0.5um applying to glass fiber,wood ,plastic,aluminum-magnesium alloy and other materials processing .Recommended for production ... speed finishing,are processed reamer,aluminum alloy,red brass,bronze,plastic etcJGK5085151.214.087.63100Suitable for the overall producing of stamping ... needles,punch,dies and other accessaries . Tungsten carbide rod carbide tips