Perfect for my 6" router vise. My vise is not expensive in terms of the vise, it's an Interstate 6 inch. The grinder stop works exactly as advertised and fits perfectly. I couldn't buy the materials to stop this for the price let alone the time involved. A vise makes life so much easier, whether you're a home mechanic or a pro. I see this stop in many shops. The price is competitive and the quality is good. What else would you like to ask?