Review on Irwin Tools Wooden Installation 3111001 by Victor Hurvitz

Here's the deal. Such a device must be strong, rigid and accurate in order to provide a quality result. This is made of plastic. He bends. It gives an approximate location of the holes, but bending means the result will always be different. No two are the same. Ultimately, this means that some of them will allow you to correctly and easily install a latch or doorknob, and others will not. In my case the holes were imprecise and the bolt installation required a lot of work to get the parts to fit. As previously mentioned, hole saws are not of the highest quality. This exacerbated the difficulty of drilling quality holes. Switched to another set of crowns 1/2 way through a door. The ones I had were cheap brands; one is connected to the port and cargo from there. In the end I was successful. If you need to pierce multiple doors and they aren't made of cream cheese, consider opting for a more durable set. If you only have one task and you have a few hours to devote to that task, this one will work.