PCB Drill BitMade of high speed steel, stable and durable, can be very convenient for cleaning your 3D printer nozzle. SizeIncluding 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm Head Diameter. Easy to Store and CarryComes with a high quality storage box for blowing, twist drills of all sizes have their own slot. Use forMini PCB drill bits can be used for plastic, fiberglass, steel, aluminum, copper and brass, titanium and jewelry. Set of 10 Micro-Carbide PCB Drill Bits This set contains 10 different drill diameters: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm. Each size has one. Made of high speed steel, hardness and stable. The drill bits are lightweight, the appropriate size does not take up extra space, can be applied for handling wood, plastic, rubber, PVC, walnut, model, bone, angle, amber, olive, fiberglass and other materials. With sharp edges, our PCB tip spiral groove reduces cutting forces, improves hole accuracy, prevents bit damage and improves drilling accuracy. Packed in plastic boxes to make it safe, clean, tidy and easy to find. It is easy to carry and protect the drill bit and bring it to the workshop and other working points. Package Includes - 1 x 10pcs Carbide PCB Drill Bits with Protective Box