Chrome Vanadium Spring Steel shaft that is through-hardened for Superior Durability. Shot-peened, double tempered finish reduces breakage. Copper braze material gives high heat resistance and reduced tip loss. Universal SDS-Max Shank fit.
This drill bit disappointed in performance, leaving it unable to handle the heavy-duty precision drilling required by industrial and scientific fields... While the design looks sturdy the composition of materials felt flimsy and left us questioning its longevity and stability over time..
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…