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Material | Cobalt |
Cutting Diameter | 0.3 Inches |
Finish Type | Gold Oxide |
Shank Type | Round |
Cutting Angle String | 118 Degrees |
Drill America Cobalt Aircraft Extension Drills are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools. Drill America Aircraft Extension Drills are manufactured to National Aerospace Standard 907. The 135° split point is self-centering and reduces thrust. Sizes smaller than 1/16 in. have the 118° standard point. Drill America Aircraft Extension Drills are available in 6 in. and 12 in. overall lengths when extra reach is required.
For over 100 years, Drill America has been a trusted supplier of industrial cutting tools worldwide. We're known for our expansive inventory of unique sizes and our commitment to fast, reliable service. We take pride in helping our customers maintain efficiency with high-quality tools, tailored support, and reduced downtime, making us a partner in their success.
In 1919, Drill America was founded in New York City as a family-run business. Now a national brand, we’re still proudly led and operated by third and fourth-generation family members.
Our vast and diverse inventory stands out. Hard-to-find sizes are always in stock, ensuring we meet our customers’ diverse needs promptly.
With our extensive inventory, we deliver what customers need quickly, cutting down on downtime saves them time and money. Our goal is to help them stay efficient and keep things running smoothly.
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Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers find the drill bit functional and sharp. It works well for them, especially in unique custom projects like drilling through tile and thick walls. They appreciate its good price and value for money. However, some customers have differing opinions on its quality and durability.
AI-generated from the text of customer reviews
Customers like the drill bits. They say the bits work well, are coated, and last longer than other ones. Some mention it worked great for a unique custom project and did an outstanding job on 3 blocks in a row without any wear. Overall, customers find the drill bits to be a good product and a great price.
"Appears to be a good product and it should work well." Read more
"...to drill several deep pilot holes in a large project and it worked great every time. No warping, stayed sharp and locks into drill easily...." Read more
"...This is a coated drill bit and worked great good quality." Read more
"Worked great! I ordered the 1/2in bit and it burrowed into Corten steel without a problem...." Read more
Customers appreciate the drill bit quality. They say it cuts fast and stays sharp, making it a good tool for drilling guitar bodies, bathroom tile, and thick walls. The 6" length allows them to drill as deep as needed and screw easily.
"...No warping, stayed sharp and locks into drill easily. Great product." Read more
"Good for deep hole" Read more
"good quality, was able to drill holes in sheet metal" Read more
"can be used as a masonry drill stop for big yellow." Read more
Customers appreciate the drill bits' good price.
"...that'll help keep it sharp rattling around in my tool chest, and fairly priced...." Read more
"...Really happy with the purchase, price and even the case it came in. Should be almost a lifetime tool the way it is working so far." Read more
"...I rated it highly in 'value for money' because the price was far, and away, better than anything I could find in my global search." Read more
"...I was very impressed and the price was reasonable." Read more
Customers appreciate the drill bit's sharpness. They find it stays sharp for a long time, cuts through metal easily, and cuts fast.
"...Glad they had it. Good quality, and used it a lot, still sharp." Read more
"...No warping, stayed sharp and locks into drill easily. Great product." Read more
"...It's nicely finished, plenty sharp for drilling wood, well packaged in a re-useable case that'll help keep it sharp rattling around in my tool chest..." Read more
"...It cuts like butter and lasts a very long time. Makes the job much less frustrating as it stays sharp for quite some time" Read more
Customers have mixed opinions about the drill bits. Some say they are good quality, strong, and last longer than other ones. Others mention that they are fragile, break easily, and lack consistent quality.
"Can’t find these locally for that size. Glad they had it. Good quality, and used it a lot, still sharp." Read more
"...It's nicely finished, plenty sharp for drilling wood, well packaged in a re-useable case that'll help keep it sharp rattling around in my tool chest..." Read more
"The first one broke within seconds of use. The subsequent one drilled multiple holes." Read more
"...It cuts like butter and lasts a very long time. Makes the job much less frustrating as it stays sharp for quite some time" Read more
Customers have different views on the drill bit's durability. Some say it lasts a long time, rips through wood easily, and doesn't bend. Others report that it broke within 30 minutes of use.
"...No warping, stayed sharp and locks into drill easily. Great product." Read more
"...Other than the initial break, there were no issues with the quality of the bit." Read more
"...for my needs, after sharpness, was stiffness, and this drill didn't bend at all. Can't speak to its longevity but it's a good product for my needs." Read more
"...Drilled three holes in 4x4 pressure treated post and the drill snapped in half ...." Read more