Review on 🔒 HQMaster Titanium Engraving Tungsten with 3 175mm Dimension by Shaun Helm

I bought these bits hoping they would be better than the uncoated version of these bits from the same company but they turned out to be a lot worse. I cut them very carefully at 300mm/min and 0.5mm ID depth, but they broke after a few minutes. Here are other bits from the same company that are better for cutting aluminum alloy: https://www.amazon.com/gp/product/B07F35WQYG/ref=crt_ewc_title_oth_1?ie=UTF8&psc=1&smid=AAN5GO04HMO72