We used this to cut through several 2 x 4s where I wanted to add a couple more electrical outlets in the garage. Not only did this cut through wood with no effort, but the hole saws in this kit can also cut through thin mild steel with no problem. And after all this cutting, the hole saws used look none the worse for wear. The way they're designed, its easy to get the wood plug out also. Made in USA  BUT the metal used to manufacture these may be from other countries.