If you already have heard something about diamond painting, the next question you may have is what drill to choose? Round or square? What is AB drills? The same question you may ask yourself if you already tried diamond painting with only one type of drills – round or square ones. Personally, I love diamond painting covered with square diamond drills. But I will try to be very objective and in this article. I will describe in detail what the pros and the cons each one has. So if you are totally new to this art, this article will be very helpful. If you have already finished one or some paintings, I expect, that you will try to use drills different than you have used to.