If you plan on trying this, wear gloves, eye protection, and a respirator. The edges are very sharp, there'll bits of rock flying straight at your face, and the silica dust can damage your lungs. Massive respect to our ancestors for manufacturing tools like this without safety equipment, would've been very risky!
You have skills I would bet a thousand buck I would crush a finger . I do it all the time a finger here a toe there concrete block to knee oh it’s horrible ever since my last surgery I’m way off it’s bad
