I bought this for my RGB LED pixel installation project. I have drilled over 2000 channel holes. The first 200 were made of U-steel and the remaining 1800+ were made of PVC. I didn't use increments other than going through the material in layers. I had a lot fewer burrs with it than with a standard 12mm steel drill bit. PVC is highly dependent on drilling speed. Overall I was satisfied and would buy it again if I had to do a similar project.