Review on Spyder 600054 Rapid Eject 6 625 Inch: Unleash Your Fast Reload Skills by Malik Munns

Advertised to drill a nice, clean hole in CMU, a soft and hollow concrete product. To put it simply, even with a very high hammer drill at the right RPM and pressure, this hole saw drill bit struggled to move forward and eventually broke, bits of the broken blade flying off, hitting my goggles and burning my face. I will be posting a picture of the destroyed blade soon but wanted to post this asap so others know it is unsafe as the CMU concrete block is advertised. Essentially this gives you a clean circle that you can use as a template to get your chisel and demo hammer to finish the job properly. Will post pics of the completed hole again, but be aware this is an expensive rig that WILL NOT CUT THE CMU BLOCK AS KNOWN! Dangerous!