This router bit is a game-changer! As a result of using this product, I found that it makes mortising a breeze. The 4-inch diameter is perfect for creating clean, precise cuts in my woodworking projects. The bit is durable and long-lasting and I love that it is made with high-quality materials .The only downside is that it is a bit pricey compared to other options on the market. HOWEVER, the quality and performance make it worth the investment. Overall, i highly recommend this router bit to any woodworker looking to achieve professional results..