Review on 🔧 LudoPam Metric Cobalt Jobber Stainless: Premium Quality and Precision Tool for Professionals by Tim Airy

These drill bits are smaller than the product image suggests. The entire 10-piece set is packed in a small plastic box for convenient storage. They are 4mm in diameter, which is about 0.16 inches. This is an approximate size I often use when drilling a pilot hole in metal for a larger self-tapping screw or screw. When drilling metal I tend to make a lot of bits. They tend to break and eventually become too dull to be of any use. I'm always happy to have a handful of these around. They are sharp and cut through metal. The split tip design prevents the drill bit from moving when you first start drilling. It is always useful to control the speed of the drill. Overheating the tip is not a good idea - it's slow and easy to win the race.