Material: tungsten carbide Product name: PCB Drill Bit Cutting diameter: 0.2-0.5 (0.3 / 0.4 / 0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.1 / 1.2mm) Cutting depth: 5mm Rod diameter : 3.175mm Total length: 36mm - This powerful and useful tool pack contains 10 sizes (0.3 / 0.4 / 0.5 / 0.6 / 0.7 / 0.8 / 0.9 / 1.0 / 1.1 / 1.2mm) which can provide great benefit for your cleaning of 3D printer nozzles. - These drills can be used on numerically controlled machines, micro-milling machines or drills, column drills or hand tools such as dremel tools. -Excellent for plastic, fiberglass, steel, aluminum, copper and brass, titanium, jewelry ..