Features 1、0.3mm drill bits, reduce cutting force and broken drill bit, improve the quality of hole wall. 2、High quality tungsten carbide, fine grinding process, making the cutting edge sharper. 3、Ideal for PCB SMT CNC board, mold, plastic, copper, stainless steel and other precise metal parts processing. 4、Including 10pcs cleaning nozzle drill bits, which are practical and economical, completely meet your needs. 5、Practical parts for 3D printer, simple installation, does not require complicated operations. Specification Item Type: Cleaning Nozzle Drill Material: Tungsten Carbide Drill Bit: Approx. 0.3mm/0.01in Quantity: 10pcs Note: If the nozzle is blocked, rotate the drill clockwise slightly, do not insert it directly, it will cause the drill bit to break! Package List 10 x Cleaning Nozzle Drill