🔧 Cobalt TopLine Drill Bits - Optimal Size for Enhanced Performance Review

According to my experience, these cobalt drill bits are the best tool for cutting through metal. They are durable and efficient and have helped me improve my precision and accuracy. The cobalt construction is perfect for industrial and scientific use, as it can withstand high temperatures and maximize power output. However, the only downside is that they can be expensive compared to other options on the market.

These are really good drills. I make carbon steel knives and this drill with no problem and they still stay sharp. I will buy again if necessary.

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.