With Drill Doctor XP, 500X and 750X 180 Grit Diamond Wheel ,Its delicate grain size ensures precise and efficient grinding, making it an essential tool for drill sharpeners Accurate : 180 grit diamond wheel only for drill doctor XP, 500X, 750X. Not suitable for 350X, SB, or any sharpener models High quality structure: 180 grit diamond grinding wheel makes your drill bit sharp again, and the sturdy structure can work continuously for Drill Doctor DA31320GF for a long time Excellent grinding performance: This grinding wheel is carefully crafted with 180 grit diamond to ensure precise and efficient grinding, making it an essential tool for your drill bit sharpener Easy to use: Simply place the wheel inside,you can re grind the drill bit accurately to keep for Drill Doctor drill bit in the best condition : Your trust is our greatest motivation. If you have any other questions about our product, please feel to at any time