工具鑽頭用研磨輪（60/80 粒度，直徑 3-1/4 英吋）

The 3-1/4 inch diameter fits perfectly on my mini lathe attachment, and the 60/80 grit removes material quickly without being too aggressive. I've used it on several tool bits now, and it leaves a clean, even edge every time.

This 60/80 grit wheel dresses up my tool bits beautifully and the 3-1/4 inch diameter fits my mini lathe attachment perfectly. The green material is noticeably finer than my old stone, giving a smoother finish without excessive material removal.

I was skeptical about the 13/16 inch hole lining up with my setup, but it slipped on without any wobble. The 60/80 grit combination handles both rough shaping and a decent finish on HSS bits in one go.