Feature:1. 10 PCS SET: The set contains 10 pcs twist drill bits, with 1 or 8in shank, easy to connect to the drill machine, come with a box for easy storage and carrying.2. EFFICIENT DRILLING: With sharply cutting edge and smoothly slot surface, the drill bits can work quickly, cleanly without leaving burrs or waste chip.3. LOCATING RING DESIGN: Designed with locating ring, reducing the machine debugging time, improving work efficiency.4. TUNGSTEN STEEL MATERIAL: The drill bits are made from tungsten steel, with strong abrasion resistance, high hardness and bending strength.5. WIDE PURPOSE: This set can be widely used for drilling and carving of amber wax, circuit board, electric board, jewelry, hardware and plastic, etc., can also be used for cleaning of 3D printer nozzles.Specification:Item Type: Twist Drill Bit SetDrill Bit Material: Tungsten SteelHandle Material: White SteelLocating Ring Material: PCBLength: Approx. 38mm or 1.5inShank Diameter: Approx. 3mm or 0.12inApplicable for: Drilling and carving of amber wax, circuit board, electric board, jewelry, hardware and plastic, etc., as well as cleaning of 3D printer nozzles.Package List:10 xTwist Drill Bit1 x Storage Box