Product Description: Material: Carbide (Tungsten Steel) Quantity: 1 x 10 Pcs PCB Drill Bits with Protective Box Size: This set contains 10 different size drill bits Diameter: 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, each size has 1pcs Using high quality materials and fine grinding process makes the cutting edge a little sharper, reduces the cutting force and broken bit, and improves the quality of the wall of the hole. Suitable for: PCB drills, engraving machine, CNC and special high-precision drilling equipment. Package includes: 1 pcb drill bit 1.1mm 1 pcb drill bit 1.2mm 1 pcb drill bit 1.3mm 1 pcb drill bit for 1.4 mm PCB 1 drill bit for 1.5 mm PCB 1 drill bit for 1.6 mm PCB 1 drill bit for PCB of 1.7 mm 1 drill bits for PCB of 1.8 mm 1 drill bits for PCB of 1.9 mm 1 drill bits for PCB of 2 .0mm High quality: PCB drill bits are made of high quality tungsten steel, highly wear-resistant, high hardness, resistance to bending, anti-weathering, high working efficiency . Good Packing: Packing with high quality plastic box, easy transportation and better protection, prevent blade tip products from being damaged during delivery. High precision: PCB drill bits have sharp edges. The spiral groove cutting edge can reduce the cutting force, prevent the drill bit from breaking, and improve the machining precision. There are no burrs or chips. Widely used: ideal for cleaning 3D printer nozzles, amber beeswax, circuit boards, bakelite, plexiglass of CNC engraving, jewelry, metal plastic and other precision drilling. Multiple Sizes: This set contains 10 drill bits of different sizes: 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, each size contains 1pcs.