Review on Rennsteig Flat Cold Chisel 24 Inch by Kadarius Gentry

I bought this to dig a 30" deep hole for a foundation (12" diameter). My house is on clay and the high power drill won't go down a few inches before the rocks stop it. Finally, I used a rock drill bit fitted with this 24" SDS Max bit to dig 9 holes for my deck base. The capacity of this hard-to-find 24-inch bit (at this price point) could save lives.