The dewalt extreme 10 piece hss-e cobalt drill bit set is a professional-grade metal drilling solution, offering a comprehensive size range from 1mm to 10mm for tackling high alloy steels and hard metals on site. Constructed with cobalt-enriched hss-e steel, these drill bits are engineered to cut through demanding materials including stainless steel, cast iron, bronze, and titanium materials that quickly overwhelm standard hss bits. The set handles metals with a tensile strength up to 1100n mm , making it a reliable choice for contractors and metalworkers working with harder alloys. The no-walk tip design prevents the bit from skating across curved or smooth metal surfaces, improving accuracy from the first contact. A reinforced central core increases fracture stability during freehand use, while the three-sided non-slip shank ensures a secure, spin-proof grip in the drill chuck a practical detail that counts when working at pace on a busy job site. Performance is further enhanced by optimised tip and flute geometry, delivering up to four times the penetration speed compared to standard hss-r drill bits. Suitable for both portable and stationary drilling applications, this set covers the most common drilling diameters in a single compact case. Features and benefits: hss-e cobalt construction for drilling hard metals including stainless steel, cast iron, bronze, and titanium no-walk tip prevents skating on curved or smooth metal surfaces for accurate hole placement three-s...