Diablo Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit - 1/2" Diameter, 13" Length, 8" Working Length - DMAMX1020

Used one on a job setting rebar server corner point markers, and held up great👍Read a few posts that said similar bits failed after thirty holes, but I did 20 or so without any sign of wear on solid pahoehoe lava flow.Slow and steady wins the race is the key with these bits, let bit cool between holes if drilling steady.

Used this to make over a dozen holes into granite ledge to break off large sections. The cutting edge was barely worn after all of the drilling done. If it can handle granite that easily concrete will be a piece of cake

Would purchase again

Works well. Good value and holds up over time drilling through concrete. Dulls pretty fast if you hit rebar but it cuts through it.

I tried these hoping they would be decent. Bit broke after 30 holes

Only lasted 3 minutes after it hit rebar excepted better really won’t waste anymore money on these bits

We drill thousands of 1/2" holes to install lattices of rebars for various construction projects, and have used every piece of high-end equipment to do it - Hilti, DeWalt, Makita, Bosch, etc. Yesterday, my mason tried this drill bit with a powerful Milwaukee SDS-Max Cordless Rotary Hammer. He called me minutes later to announce that he had drilled 26 4-inch deep holes in hardened concrete in 5 minutes. He was blown away, and has done that work for many years. Part of the credit goes to the drill, but the bit is equally critical. This bit is what we will use from now on. He won't use anything else.

Diablo makes great products saw blade concrete bits etc.