I use this drill bit with a Bosch 11240 1-9/16" rotary hammer and it gnaws through concrete with minimal effort. I've drilled about 25 holes with it and the bit still sees brand new out. About a minute to drill 8" of concrete, minimal pressure on the tool. Having four cutter heads makes a huge difference. I have not experienced any binding at all. We use this drill bit to drill through the base assembly and concrete (about 20" of dead space before we touch the top foundation) to install the…