After trying this product I must say that I am extremely impressed with its performance. These router bits have not only cut through plastic like butter but have also left a clean and smooth finish, making my job much easier... The industrial grade carbide material has proved to be durable and long-lasting, ensuring that I get my moneys worth. The only downside is that these cutting tools may not be as cost-effective as some other options in the market. Overall, i would highly recommend these to anyone in the industrial and SCIENTIFIC field..