I did 2 holes on a far end of the concrete to test it out. I took pics and will see if they upload. The numbers and notes are hard to see, but I did one with 1/8" up to 3/4" with 1/8" increments for bits. Then one I did 1/8" right to 3/4". I have a craftsman 7 amp hammer drill. I will look at the Harbor Freight one as well just in case. I will have to wait for the cover and see if the anchors have a lip or what. It did mention 1 5/8" deep holes I think. I am not sure how many anchors it has. I will not mention which one I think looks better because I am not positive how exactly round or deep they need to be. I was going to see if one would slide into the hole and how snug it is when the anchors get here. Not going to force them in because they won't be staying in the 2 test holes I drilled.