I was so impressed with my full size set that I decided to buy these as well. So what happened is that my garage door tension spring system finally succumbed to the patch fixes I've been giving it all these years. I knew I needed a new one and after further research I realized the Clopay EZ Torque Tube System was the way to go. How will this affect this product? Well my house was built in 1955 and the existing brackets were very strong and the metal I needed to cut the big hole was heavy duty steel. You know, the kind that's hard to hit with a drill. So I used one of those carbide tipped bits and it was no small feat but it cut through consistently leaving a clean hole and more importantly the carbide bit didn't lose its super sharpness. edge. Since these drill presses are just as efficient and even more efficient at cutting wood, I figured I needed another set for my wood shop, let alone if I have any metalwork that might show up up there. So I bought this set too. They are individually packed in a separate snap-lock plastic case. I'm critical of this because I now think carbide tipped bits don't play well in collisions. You have personal protection. I have a large set of standard hole saws that come with your drill bit, but they don't even come close to what these kids can do, which is carefully climb through a piece of wood. So I can highly recommend them.