Description: 【Drill Grinder】: Drill grinder grinding tool for drilling bit high hardness sharpener hand drill sharpening tool 【Grinding Tools】: The product comes with a sharpening stone tool , ideal for grinding and polishing drill to maintain their effectiveness over time 【Sturdy Construction 】: Drill Grinder Grinding Tool is made from pp material, wear resistant, and easy to use 【Compatibility】: The sharpener features a 6.35mm (1/4 inch) hex shank diameter compatible for various tools including electric, manual, and pneumatic screwdrivers. It suitable for 2.0-12.5mm iron based drill but is not recommended for harder materials due to potential wear 【Portable】: This Portable Bit Sharpener is small and portable practical tools,and carry wherever you are Specification: Material: PP Size Chart: 17 cmx5 cmx1.5 cm/6.69 inchx1.97 inchx0.59 inch  Package Includes: 1 blue drill grinder 1 wrench 2 clips Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.