Review on Premium Wet Drill Core Bits For Concrete And Hard Masonry - 10Mm Segment Height, 12" Drilling Depth, 5/8"-11 Arbor - Ideal For Wet Drilling Only by Ari Tanner

I'm planning on using some of the native limestone on my property to make a water feature that looks like a natural spring. I used this bit to bore through one that was about 8" thick and then chisel around it for practice before I work on the one I will install permanently. Driven with a Bosch SDS Plus hammer drill through a 5/8-11 arbor, I had no trouble going through it in 10-15 minutes. I did take it slow and kept a hose on it the whole time. You can see in the picture that the bit made a nice round hole, though it left a little of its red paint on the sides, easily removed. I did not see the very helpful idea of using bored-out wood as a guide, but I will probably try that. Also though, since the sides of the bit are smooth and wet, and since the bit has no "teeth" as such, you can simply use your hand to guide it. The 1½" bit I bought turned out to be a little oversized for 1" PVC, so I'm buying another one that's 1-3/8 for the final cut.