5/16 Inch x 8 Inch Drill Bit – Long Drill Bit, Industrial Black Oxide Coating – Cobalt Aircraft Extension Drill Bits for Steel, Hard Metal, Cast Iron, Wood, Plastic

5/16 Inch x 8 Inch Drill Bit – Long Drill Bit, Industrial Black Oxide Coating – Cobalt Aircraft Extension Drill Bits for Steel, Hard Metal, Cast Iron, Wood, Plastic

• Accurate Dimensions for Targeted Drilling: Engineered to a precise cutting diameter of 5/16" and an overall length of 8", these drill bits deliver the exactness required to tackle a diverse array of drilling jobs with consistent results.
• Long-Lasting Black Oxide Finish: Equipped with a black oxide coating and a 135° split point construction, these bits boast a 50% longer service life compared to standard HSS bits. They strike an optimal balance between hardness and toughness, significantly boosting resistance to wear and tear.
• Broad Range of Practical Uses: Built for versatility, these aircraft extension drill bits excel at accessing hard-to-reach areas in materials such as sheet metal, stainless steel, aluminum, copper, and beyond. This makes them an ideal choice for a wide spectrum of projects, both professional and DIY.
• Improved Lubricity via Black Oxide Treatment: The black oxide treatment not only enhances lubricity but also forms tiny pockets on the tool's surface. These pockets hold coolant close to the cutting edge, effectively boosting drilling efficiency.
• Efficient Chip Removal Design: Featuring a right-hand cut pattern, these spiral-fluted tools lift and clear chips upward and away from the cutting zone. This minimizes the chance of clogging during drilling operations, ensuring smooth and uninterrupted work.