Mountain 5/16" Cobalt Drill Bit - Mountain

Features and Benefits:

• Made from premium grade cobalt steel
• 135 Split Point, starts cutting at the starting surface
• For use in extremely hard metals, including stainless steel
• No center punch needed
• Aerospace NAS907-J specifications

Cobalt 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.