1. DRILL BIT SET SHARPNER APPLICABLE TYPE: This diamond drill bit sharpener is mainly used for grinding iron drills, not suitable for other high hardness drills. This metal drill bit sharpener will be your good 2. EASILY INCREASE THE LIFE OF DRILL BITS: Power drill bit sharpeners. Forget the days of trying to find the correct angle by hand or accidentally tapering the edge of your drill bit. Improve the utilization of drill bits, solve the troubles of constantly buying drill bits, save time and save money. 3. RELIABLE EFFICIENT: Drill attachment drill bit sharpener. Compact and portable drill grinding tool, use this drill bit sharpening tool with your power drill to keep bits sharp and ready 4. CONVENIENT TO CARRY: You can carry this portable drill bit sharpener in your truck toolbox, so that you don't have to go to the hardware store to buy a drill bit. In a critical juncture, this tool will do your job well enough, saving the days of manually searching for the correct angle or accidentally making the edge of the tool tapered. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.