New tiles in the shower and I didn't want to make weird lines and complex tile cuts so it was SUPER useful to use. I felt like a liar. It is a strange pleasure to use this tool. much easier than a tile cutter (I cut 33x11 tiles so sawing was another adventure). I used a fairly cheap drill that was probably 15 years old and worked fine. at an angle to make a notch for the piece to fit in and then as it gets deeper you can level it and make a drill.