Professional Sharpening: Designed for φ3–13 mm drill bits, VEVOR MR-13D drill bit sharpener with 11 elastic collets excels at sharpening the point angle, lip relief angle, and front cutting edge, quickly restoring your bits to optimal sharpness and precision

Multiple Adjustments: The drill bits grinder sharpener offers flexible adjustment for the lip relief angle, front cutting lip, and 95°–135° adjustable drill point angle, precisely matching various bit styles and drilling needs, ensuring smoother and more accurate sharpening results

Efficient Grinding Wheel: The CBN grinding wheel (pre-installed) is designed for high-speed steel materials, greatly improving grinding precision and efficiency. Paired with the 5800 RPM high-speed motor, it delivers fast and efficient drill bits sharpening

Multi-Functional Use: Specialized in drill bits re-sharpening, this professional grinding sharpening machine keeps your bits sharp and ready for action — whether you're working in a factory, workshop, garage, or on home DIY projects. Premium carbon steel body for durability

How to Adjust: For Lip Relief Angle - Move the small block outward for a smaller angle or inward for a larger one. For Front Cutting Lip - Loosen the side screw, hold the positioning pin, and rotate it to adjust (Both adjustments are highly recommended by professionals)