These drill bits are very soft and easily bend when drilling concrete. They are also relatively blunt which means it is difficult to drill more than 1 or 2 holes with the same bit. I've bought other bits of the same size that work through a dozen holes before dulling. The only good thing about these bits is that the head doesn't break. It just dulls or bends.
πͺ Durable DEWALT DW3986C Portable Blade 3 Pack for Efficient Cutting
10 Review
High-Performance Bosch BS80 6W Bandsaw - 80 Inch 4 Inch Blades
11 Review
πͺ Bi-Metal Cutting Blades: Imachinist S933414 - Enhancing Precision and Performance
10 Review
Olson 80 Inch Blade FB14580DB-025
10 Review