Check the listing for details. MR-13A Drill Bits Sharpener Grinder 2-13 mm 100-135 Angle Grinding Machine. Condition: New, Made in China. Listed at 397.04 USD. This machine is fool-drill grinding machine, precision grinding and fast, simple operation, without skills can easily grind. Affordable, saving costs and improve efficiency in the use. A wheel just to complete all the processes, the precise angle, long life.