Review on 🔧 Cobalt TopLine Drill Bits - Optimal Size for Enhanced Performance by Andy Edwards

Prompt delivery, well packed, looks good but I haven't used it so I don't know how well it works and how long it will last. If there is a good life I would give it 5*. BUT it's a tap sized drill bit so it won't be of much use. I like to replace the drills with M42 Cobalt as this type of steel requires more heat and it is difficult to keep cutting oil in deep holes, especially in lathe work.