Based on my experience with this clamshelled recessed installation, I must say it`s one of the best tools in the Hole Saws and Accessories category.The industrial and scientific design is excellent and it's built to last. The installation is effortless and fits perfectly. The laser marking is great and helps to achieve accurate cuts. However, it's not suitable for thin sheets. Overall this is a reliable tool to have, and I would highly recommend it to anyone..