For the price, I was afraid it might be lightweight and flimsy. But the online videos made it look substantial and indeed it is a well-built tool. We were surprised to find almost no mortise installation services in town - and the one that said they could do it would only do 1 3/4" doors. Our 1 3/8" interior door had few options until we found this tool. It worked great! Adjustable for width, height, and depth. Recommended. And for the price, a real bargain.
Kin 
