Best Uncoated /Black Oxide Jobber Drill Bits of 2026

The Drill America DWDCO30P12 #30 Cobalt Drill Bit (Pack of 12) from the DWDCO Series is made of cobalt steel with a gold oxide surface treatment. It has round shanks and spiral fluted tools that are ideal for drilling in tough, high tensile strength materials. The cobalt steel provides improved performance when cutting harder metals such as stainless steel or nickel alloys. The gold oxide surface treatment is thinner than black oxide but performs similarly to uncoated tools. The round shanks allow for use with a variety of toolholding systems.

The Drill America Cobalt Drill Bit is designed to tackle tough materials such as stainless steel, inconel, and titanium. Its 135° split point tip helps prevent the drill from slipping, ensuring precise drilling every time. With round shanks, this bit is compatible with various tool holding systems, providing versatility for your projects. The gold oxide finish offers a thinner surface treatment compared to black oxide, delivering similar performance to uncoated tools. This 6" drill bit is perfect for situations where extra length is needed to reach difficult areas.

The Drill America Cobalt Drill is designed to handle tough materials like stainless steel, inconel, and titanium, making it ideal for heavy-duty projects. Its 135° split point tip helps you start drilling precisely without the bit slipping or wandering. The round shank design fits most tool holders, giving you flexibility with your equipment. Additionally, the gold oxide coating offers a durable surface that's similar in performance to uncoated tools, helping to extend the bit's life and maintain sharpness. Overall, this drill bit gives you reliable performance and added reach with its 6-inch length.

The Drill America Cobalt Drill is designed to help you easily drill through tough metals like stainless steel, inconel, and titanium, which are usually hard to work with. It has a special 135° split point tip that keeps the drill steady and prevents it from slipping as you start drilling. The round shank design means it fits with many different tool holders, giving you flexibility in how you use it. Plus, it features a gold oxide coating that, while thinner than typical black oxide, still offers protection and performance similar to uncoated cobalt tools, helping the drill last longer during your projects.

The Drill America Cobalt Drill Bit is designed to tackle tough materials like stainless steel and titanium. Its 135° split point tip helps you drill accurately, preventing the bit from wandering off your mark. You’ll appreciate the round shank design, which allows you to use this bit with various tool holding systems, adding versatility to your toolbox. With a 6-inch length, this drill bit offers extra reach for deeper drilling tasks, making it a reliable choice for both professionals and DIY enthusiasts.