Review on 🔪 Precision Diameter Cutting with JESTUOUS Carbide Stainless Tools by Charlie Wilson

They didn't last long. I work in the electrical engineering field. I bought these instead of the Milwaukee brand and they lasted about 50 holes or so. The teeth wear out pretty quickly. I have it on a slow drill and I didn't even run the drill at full speed so they last longer. Maybe 2 or 3 months at most. They work great and make holes in panels and junction boxes fairly quickly and cleanly, but not for as long as I'd like.