Best Long Drill Bits for Cutting of 2025

The SALI Cobalt Drill Bits are designed for precision and durability. With a cutting diameter of 1/8" and a length of 12", these bits are perfect for various drilling tasks. Their black oxide coating not only extends their lifespan but also improves toughness and wear resistance, making them reliable for tough materials. You will appreciate the enhanced lubricity provided by the black oxide treatment, which helps keep the bits cool during use. Additionally, the right-hand cut design effectively removes chips, ensuring a smooth drilling experience without clogging.

The kwb HSS Drill Bit is an extra-long tool designed for precision drilling tasks. Its 5 mm diameter and 132 mm length make it ideal for reaching tight spaces while ensuring accurate results. Made from precision-ground steel, this drill bit provides smooth and efficient cutting through various materials, including steel and hard plastics. Its industrial quality ensures durability and consistent performance, so you can tackle a range of projects with confidence. Whether you're working on alloyed steel or non-ferrous metals, this drill bit will meet your needs effectively.

The Cleveland 950E Drill Bit is designed for deeper drilling and extended reach, making it more effective than standard drill bits. Its high-speed steel construction ensures durability and resistance to wear, giving you confidence in its longevity. The black oxide finish not only helps reduce wear but also enhances chip and coolant flow, improving your drilling efficiency. With a self-centering 118-degree notched point, this drill bit penetrates materials easily, eliminating the need for a pilot hole and maintaining a sharp edge for precise cuts. This combination of features makes the Cleveland 950E an excellent choice for various drilling tasks.

The Drill America Extension Drill Bit is designed for a variety of general-purpose tasks. Made from high-speed steel, it combines strength and durability, ensuring it withstands wear over time. The black oxide finish enhances lubrication and helps maintain coolant near the cutting edge, which can improve your drilling efficiency. Its round shank design makes it compatible with many tool holders, offering you flexibility in your tool setup. Additionally, when used in a counterclockwise direction, the spiral flutes effectively remove chips from the cutting area, helping to prevent clogging and keeping your work area cleaner.

This long drill bit set comes with 5 sizes ranging from 1/4" to 1/2" with an overall length of 6". Made of high-speed steel, these drill bits are great for general purpose applications and have a black oxide treatment for added lubricity. They are designed to perform well in a variety of materials in the iron and steel families, and manufactured to a national aerospace standard.

This set includes 6 pieces of 1/8-inch aircraft extension drill bits with a case, made from premium M2 high-speed steel, with a black oxide coating to resist corrosion. The 1/8-inch cutting diameter, 1-5/8-inch flute length, and 6-inch overall length with a 135-degree split point and straight shank make them ideal for extra reach and deep drilling applications in medium and softer materials, such as soft metal, PVC and wood.

This 5/16" x 6" High Speed Steel Aircraft Extension Drill Bit belongs to the DWDA/C Series. The black oxide treatment helps hold coolant near the cutting edge and reduces clogging. Its round shank allows compatibility with various tool holding systems. The right-hand cut spiral fluted tools evacuate chips up and out of the cut, making it suitable for most general-purpose applications. It is manufactured to national aerospace standard 907.

The WL Fuller Taper Point Drill is crafted from high-speed steel, ensuring that it maintains its sharp cutting edge for longer periods. This durability means you can rely on it for consistent performance, whether you are working with hard or softwoods. Its design makes it suitable for various applications, whether you’re using it in a drill press or handheld equipment. This versatility allows you to tackle most jobs with ease, providing convenience and efficiency in your projects.

The Drill America Extension Bit is designed for a variety of general applications, offering durability and strength due to its high-speed steel construction. This material provides excellent wear resistance, ensuring that your bits last longer. With a black oxide finish, the bit enhances lubricity, helping to keep the cutting edge cool and efficient during use. Its round shank design allows for compatibility with various tool holding systems, making it versatile for different projects. Additionally, the spiral flute design helps to effectively remove chips, keeping your work area clear and reducing the chance of clogging.

The Drill America Drill Bit is crafted from high-speed steel, making it ideal for a variety of general-purpose tasks. This material offers both hardness and durability, ensuring it withstands wear over time. The black oxide treatment enhances the bit's lubricity, helping to keep the cutting edge cool while you work. Its round shank design allows for compatibility with numerous tool holding systems, providing you with flexibility in your projects. Additionally, this bit features spiral flutes that efficiently remove chips from the cut, reducing the chances of clogging and improving overall performance.