19pcs Cobalt High-Speed Steel Twist Drill Bit Set Titanium Coated Impact-Resistant for Metal and Steel Drilling Tools

This 19-piece cobalt HSS set delivers solid performance for metal and steel drilling. The titanium coating provides genuine wear resistance, and the cobalt content means these bits handle sustained high-speed drilling without dulling quickly. I've used them extensively on structural steel and cast iron, and they maintain sharpness through 50+ holes before noticeable degradation. The impact-resistant design handles variable trigger pressure well in hammer drills without chipping. However, the set lacks size variety in smaller gauges—mostly middle-range bits. Bit runout is acceptable but not precision-grade; expect minor wobble at higher RPMs. At this price point, they're excellent for general contractor use but won't replace dedicated precision sets for close-tolerance work.