Specifications:Product name: Countersink Drill Bit Material: Steel, Alloy SteelColor: OrangeOptional Size: 5PCS(8MM),5PCS(10MM),5PCS(Center drill)Shank: 8mm/10mmSuitable for: Woodworking drilling, counterbore.Usage models: bench drill, lithium electric drill, and hand electric drill.Note:1. Attention for users of charging drills: The torque of the 12 charging drills is not sufficient and it is not recommended to use them. It is recommended to use 36 and 48V charging drills.2. Manual measurement, there may be some deviation, please refer to the actual delivery!3. There may be color difference due to lighting issues during image shooting, subject to actual arrival!