Good MaterialThese cutters are made of carbide superfine tungsten for extra hardness high, resistance to wear and long life. And the cutting edge is quite sharp. These etching tips have resistance to bending and resistance to sufficient wear. The Professional's Role Many items or materials can be engraved, for example ex. B. PCB, plastics, copper, etc. Usually these cutters are used to cut acrylic, PVC, MDF. You can handle all kinds of metal, plastic, resin, dense cardboard, etc. Sealing plate wooden, etc. and many other soft materials. Good Effect er a smooth cutting surface. Cutting performance, ensure the efficiency. high work. The bur designed by double straight flutes with the sharp cutting edge would offer smooth cutting surface and chip clearing. Countersink, hole and flat edge, surface clean, tidy, no burr. Strong Flexibility Cutting diameter diameter: 3.175mm (1/8") and cutting length: 17mm (0.67") suitable for milling machines or CNC cutting machines. double blur are used for superior chip evacuation. Select the correct tool type and optimize the shedding method. < span class="a-list-item">Special Treatment Special non-ferrous metals can be roughened, and the efficiency is reduced. processing time is very high.