Check the listing for details. Portable High Speed Steel Drill Bit Grinding KJ-13 Drill Bit Sharpening Machine. Condition: New. Listed at 421.32 USD. eBay Portable High Speed Steel Drill Bit Grinding KJ-13 Drill Bit Sharpening Machine Features: (1) Professional drill edge grinding machine, precise and fast grinding, simple operation. It can be easily ground without skills. (2) Economical and practical, greatly saving costs and improving use efficiency. (3) The diamond grinding wheel is directly installed, the angle is accurate, and the service life is long. (4) This machine is equipped with a static point (center point) size adjustment function, which can control the quality and accuracy of the workpiece and extend the life of the drill. Grinding range:Φ3-Φ13mm Tip angle (tip angle):90o-145o power supply :B: AC 220V 50Hz/60Hz 120W Rotating speed: 6400 R.P.M/min Grinding wheel: CBN230# (special for white steel drill) (optional for SDC tungsten steel) Packing size (length X width X height): 36 x 20 x 22(cm) Gross weight: 9.4 kg Chuck specifications: ER20