Features: PiraticalToolKit: The tool kit includes aM8 universaldrill bits amotor connecting shaft and ahexagon wrench. Material: Madeof quality metal with excellent workmanship thedrill bits is solid wear-resistant and durable. Various Size:According to the motor shaft diameter the shaft hole diameter is 2mm/2.35mm/3mm/3.17mm/5mm for your choice. Easy Installation:The three-jaw head design making the hardware is easy to install easy to use and replace. After-sales Service: If you have any problem please contact us immediately we will help you solve it as soon as possible. Specifications: Drill BitsMaterial: Metal Drill Bits Weight: 20g Notes: Please note that due to the influence of light and screen slight chromatic aberration is acceptable. Please allow slight measurement error due to manual measurement. includes: 1 * M8 UniversalDrill Bits 1 *Motor Connecting Shaft 1 * Hexagon Wrench "