Review on 🔩 Amoolo Twist Drill: Cobalt Stainless Steel by Brandon Gaines

I use them quite often in my daily work. I bought 2 sets and use them to poke holes in broken bolts and enlarge them to get them out of a bolt hole with a variety of pullers. I start with smaller bits and gradually increase the size of the bits before using the extractor. After drilling I use milling cutters to remove more metal from the screw depending on screw size and size/type of extractor. The drill bits work well since I'm working with steel bolts. I broke off a few tips and changed a few more, over time they became dull. I'm impressed with the durability, unlike other attachments I've used. When working with materials other than steel or metal, these bits could last quite a while. But for my heavy industrial use, I was impressed with these cobalt bits. Great price for a set of beats. They work the same as the more expensive cobalt bits so I was happy with my purchase. I appreciate the value. If I need more, this is what I get.