Review on 🔧 DEWALT DW5902: Ultimate Core Drilling Efficiency with 2 Inch & 4 Inch Capacity by Bill Howard

I need to drill five inch round holes in hard cement. For a dry drill this works very well. It should say somewhere that this bit requires both a shank and a medium bit, so that's about $75 more. Also, this bit may not work well overall. However, it copes well with smooth cement and concrete. When you reach the maximum depth (about 3 inches), pull out the bit and drill out the first cut, then you can stop drilling. I made 20 holes without regrinding.