I need to drill precise holes in 1 inch diameter bricks and this was the best option I found. Unfortunately, what they sent me turned out to be rubbish. This ruined my project and revealed that the pilot drill and possibly the main drill were slightly deformed. I've tried resetting install, water, tried that on a few subsequent bricks to see if I made any user errors, and no. This part was about launching devastating trills each time, destroying a random orbit of about 2-3 cm of upper surfaceโฆ