Description This item is manufactured with premium tungsten steel material for durable and long lasting use. The tip is really so it can drill quickly with less chips. It can clear nozzles and produce finer prints. Suitable for circuit board, electron, mould, metal processing, etc. Feature - Color: Random Color. - Material: Tungsten steel. - Size: About 4 * 0.5 * 0.5cm/1.57 * 0.2 * 0.2inch(L*W*H). - Made of tungsten steel material, it is durable and long lasting use. - It can clear nozzles and produce finer prints. - Suitable for circuit board, electron, mould, metal processing, etc. - The tip is really so it can drill quickly with less chips.Packing list: 1 x set of 10Pcs 0.4mm Drill Bits for 3D Printer Extruder Nozzle Head Cleaner Kit (Random Color)