If you are buying or have a Tapco siding break, this option is well worth the money. It saves time and gives you clean straight edges on your trim pieces. After cutting aluminum trim coil by hand for years, I wish I had the Pro Cut-Off a long time ago. The case provides a compact secure storage case to protect your investment. Shop around, prices vary considerably (Amazon was the lowest price I found). I am very satisfied with this well made tool.