SALI Cobalt Aircraft Extension Drill Bits,1/2"×12" Long Length Drill Bits for Drilling into Sheet Metal, Stainless, Aluminum, Wood, & Copper

Precision in size and length:Crafted with a cutting diameter of 1/2" and a total length of 12", these drill bits offer the precision needed for various drilling tasks
Durable black oxide coating:Featuring a black oxide coating and a 135° split point design, while lasting 50% longer than standard hss bits, offering a balance of hardness and toughness for enhanced wear resistance
Versatile applications:Designed for versatility, these aircraft extension bits can reach challenging spots in materials like sheet metal, stainless steel, aluminum, copper, and more, making them suitable for a wide range of projects
Enhanced lubricity with black oxide treatment:The black oxide treatment not only enhances lubricity but also creates small pockets on the tool's surface to retain coolant near the cutting edge, improving efficiency
Chip evacuation efficiency:With a right-hand cut design, the spiral fluted tools evacuate chips upward and away from the cutting area, reducing the risk of clogging during drilling operations