7/16" Cobalt Drill Bit for Metal, Wood & Masonry - High Speed Steel Drill Bit Set for Professional & DIY Projects - Perfect for Drilling Hard Materials & Construction Work

Made from premium grade cobalt steel135 Split Point, starts cutting at the starting surfaceFor use in extremely hard metals, including stainless steelNo center punch neededAerospace NAS907-J specificationsCobalt drill bits are designed to cut through extremely hard metals, including stainless steel. The Quick Cut Points are self-centering and penetrate faster with less pressure. It will not "walk" or "wander" at the starting surface. Extremely heat resistant, must be operated in power units that have a RPM speed of 1,500 or higher for maximum efficiency. Made in the USA.