Portable Drill Sharpener: This convenient drill sharpener is ideal for maintaining the sharpness of your drill bits, whether you're in a factory, workshop, garage, or tackling DIY projects at home. Adjustable Drill Point Angle: The MR-13A/B/D models allow for drill point angle adjustments from 90° to 140°, while the MR-20G adjusts from 95° to 140°. This feature ensures precise compatibility with various drilling materials and rotation speeds, guaranteeing drilling accuracy within 0.1 mm. High-Performance Pure Copper Motor: Equipped with a powerful DC motor, this drill sharpener operates at a high speed of 4400 rpm while producing minimal noise, making it both effective and user-friendly. Versatile Grinding Wheel Options: Choose between CBN and SDC grinding wheels. CBN wheels are optimized for high-speed steel, while SDC wheels are perfect for grinding alloy steel. The device comes standard with a CBN grinding wheel for your convenience. 15/18 Standard Chuck: Compatible with drill bits ranging from φ3 to φ15mm (or φ3 to φ20mm), this sharpener is designed for ease of use, requiring no prior sharpening experience. Its intuitive design allows you to sharpen drill bits in just minutes.