Review on 🔧 Enhance Drilling Efficiency with DEWALT DW5209 Premium Percussion Carbide by Jonathan Ulsth

Came from someone with very hard concrete floors in the apartment that fits. I tried some cheaper bits (at the local hardware store) and in a couple of holes I must have hit either rebar or infill because they just couldn't get past until they burned out. These guys have done a good job and they have plenty of life left. Note that the 3" length includes a 1" triangular ground shaft. In concrete, and especially with a hammer drill, you need to hold the bit well so that 1 inch isn't available for drilling. The deepest hole you can realistically make with this bit is 2" which was perfect for my 1.75" screws. FYI: For those using concrete screws (Tapcon, etc.), this bit is for 1/4" diameter and 1 3/4" length or shorter. burned-out attempts) I like to give 5 stars. The price when I bought it was probably a little higher than retail, but a few cents difference saved me a trip to the big hardware store as the local types weren't exactly that size.