Description of Unleash Precision with πͺ Drill America Killer High-Speed Degrees
High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. For use in wood, metal, stainless and other hard metal drilling. 135Β° split point tip prevents drill from "walking". Combination of hardness and toughness for wear resistance. Black and gold drills are manufactured from premium grade high speed steel.
Excellent drills for my application. I make knives to order and go through 1/4 of a serving like gravy through a goose. It slowed my consumption by 1/2. I was surprised and definitely satisfied with the result.
I was trying to drill an aluminum rivet and the drill dulled before I was halfway through. The guy was scarred. I had to deal with my old drill that I used to drill dozens of rivets. Definitely the worst thing I've experienced in a long time
I've used them all on the same type of metal. Half of the drill bits started the hole well, the others seemed too dull to work even when the drill bit was held for a long time. I had to wrap some tape around them to keep the chuck in place since the shank is no larger than the cutting part, but that's pretty normal for a piece of this size.