Check the listing for details. Drill Bit Sharpener Tool MR-26A Angle Grinder Grinding 13-26mm Power Sharpening. Condition: New. Listed at 687.78 USD. Grinding Range. Grinding wheel :CBN (for HSS)×1. Grinding is accurate and rapid, easy operation with no skill to grind. With diamond grinding wheel, it can be equipped directly with an accurate angle and long service life.