I had to cut 7 pocket doors with unique hardware. 7" tall, 11/16" wide, 4" slot deep. All doors are perfect. I liked using my own drill bit so I didn't have to pay for another tool. Self-centering on door edge. Fully adjustable in height and foot depth. Comes with a drill, extension and rubber grips, great latitude and possibility of error I was pleasantly surprised at how smooth and correct the finished product turned out Positive hold on the finished door I really had to buy an 11/16 bit and an extension See the bits looked like it was straight out of a locksmith's toolbox. Lots of carbide. I broke a tooth on a new door. I was able to lock. I asked professional local door companies to mediate the complexity of the joint. I was very happy to be able to do it myself and it worked great.