Best Extra Long Drill Bits for Metal of 2025

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These extra long drill bits for metal are designed to provide precise and efficient drilling in hard materials. With their extended length, they are perfect for reaching deep and narrow spaces that standard drill bits cannot access. The high-quality construction ensures durability and strength, allowing for smooth and accurate drilling without compromising on performance. Whether you are a professional or a DIY enthusiast, these extra long drill bits are a valuable addition to your toolkit, making metal drilling tasks easier and more convenient.
At a Glance: Our Top Picks
Top 10 Extra Long Drill Bits for Metal
sourcing map HSS Extra Long Twist Drill Bits
The sourcing map Twist Drill Bits are designed for precision and durability. With a diameter of 4mm and a length of 160mm, these high-speed steel bits are ideal for drilling through non-ferrous metals, hard plastics, and more. Their twisted design enhances cutting accuracy, ensuring the drill bit stays centred and reduces displacement during use. Additionally, the high strength and hardness of the material contribute to a longer drilling life, making these bits a reliable choice for both professional and DIY projects.
sourcing map HSS Extra Long Drill Bits
The sourcing map Extra Long Bits are designed for precision and durability. With a 6mm diameter and a length of 300mm, these high-speed steel drill bits are perfect for various materials including non-ferrous metals and hard plastics. Their twisted design enhances cutting accuracy and helps prevent displacement during use, making drilling easier and faster. Additionally, the robust HSS construction ensures a longer drilling life, giving you reliable performance for both professional and DIY projects.
sourcing map HSS Extra Long Twist Drill Bits
The sourcing map Twist Drill Bits are designed for precision and durability. With a diameter of 3.5mm and a length of 160mm, these high-speed steel bits are ideal for drilling through hardened metals, plastics, and aluminium alloys. Their twisted design enhances cutting accuracy and reduces the risk of displacement, making your drilling tasks easier. Additionally, the bits are perfect for both professional and DIY use. Adjusting the RPM can help when encountering tougher materials, ensuring a smoother drilling experience.
sourcing map 3mm Extra Long Drill Bits
The sourcing map Drill Bits are designed for precision and durability. With a diameter of 3mm and a length of 200mm, these high-speed steel bits are perfect for drilling into hardened metals and plastics. Their twisted design enhances cutting accuracy and reduces the risk of bit displacement, allowing you to work more efficiently. Moreover, they can easily remove debris, making your drilling tasks smoother and quicker. Whether you're a professional or a DIY enthusiast, these drill bits are a reliable choice for various applications.
sourcing map HSS Extra Long Drill Bits
The sourcing map Drill Bits are designed for precision and durability. With an 8mm diameter and a total length of 250mm, these high-speed steel bits provide a longer drilling life, making them ideal for various materials. The twisted design enhances cutting accuracy by centring the tip, ensuring less displacement during use. Additionally, these bits efficiently remove debris, allowing for smoother operation. Whether you are a professional or a DIY enthusiast, these drill bits are versatile enough for non-ferrous metals and hard plastics.
kwb Extra Long HSS Metal Drill Bit
The kwb HSS Drill Bit is designed for precision drilling, ensuring accurate results that meet DIN 340 standards. Its versatility allows you to work with a range of materials, including various steels and hard plastics. You will appreciate the easy start feature, which eliminates the need for centre punching or pilot holes thanks to its 135° pointed tip. Additionally, its durable design guarantees long-lasting performance, making it a reliable choice for your drilling needs.
sourcing map HSS Extra Long Drill Bits
The sourcing map Drill Bits are designed for precision and durability. With a diameter of 4mm and an extended length of 200mm, these high-speed steel bits ensure a longer drilling life. Their twisted design enhances cutting accuracy, allowing you to centre the tip effectively and reduce displacement during use. This feature also aids in the swift removal of debris, making your drilling tasks much easier. Furthermore, they are versatile enough for both professional and DIY applications, suitable for non-ferrous metals and hard plastics.
TOP-VIGOR 4.2mm Extra Long Twist Drill Bits
The TOP-VIGOR Twist Drill Bits are designed for efficient and precise drilling. With a diameter of 4.2mm and an extended length of 160mm, these bits are perfect for a variety of materials including wood, metal, and plastic. Made from high-speed steel, they offer exceptional durability and wear resistance, ensuring a long service life. The double cutting edge design enhances drilling speed and accuracy, while the straight shank makes them compatible with various toolholding systems, providing you with versatility during your projects.
ANMOO 6Pcs Extra Long Twist Drill Bit Set
The ANMOO Extra Long Drill Bits are designed to enhance your drilling experience. The 4mm diameter and 160mm length make them ideal for various materials, including non-ferrous metals and hard plastics. Their twisted design improves cutting accuracy, ensuring that the drill stays centred and reduces the risk of shifting during use. Made from high-speed steel, these bits are both strong and durable, providing long-lasting performance. Whether you are a professional or a DIY enthusiast, these bits are suitable for various drilling tools, allowing you to tackle your projects with ease.
Saim Extra Long HSS Twist Drill Bits
The Saim HSS Drill Bits are designed for precision and durability. Made from high-speed steel, these bits offer exceptional hardness, ensuring a longer drilling life. Their twisted design enhances cutting accuracy, helping you centre the tip for better results. Additionally, this design allows for faster removal of debris, keeping your work area clear. With a length of 160mm, these bits are suitable for a range of materials like copper, aluminium, and hard plastics, making them ideal for both professional and DIY projects.
Frequently Asked Questions (FAQs)
1. What are long drill bits called?
A unibit (often called a step drill bit) is a roughly conical bit with a stairstep profile. Due to its design, a single bit can be used for drilling a wide range of hole sizes. Some bits come to a point and are thus self-starting. The larger-size bits have blunt tips and are used for hole enlarging.
2. What is the largest drill bit you can buy?
Some projects call for specific drill bit sizes, but a bit set that includes sizes from 1/16 inch to 1/4 inch will work for many jobs around the home and workshop. You can add larger bits — 5/16-inch, 3/8-inch, 7/16-inch and 1/2-inch bits — if you need them.
3. What drill bit can drill multiple sized holes in metal?
A step drill bit for metal allows you to drill holes in a variety of diameters, and some will drill through metal up to 3/8 in. thick. The downside? Step bits are more expensive than regular bits.
During our extra long drill bit for metal research, we found 74 extra long drill bit for metal products and shortlisted 10 quality products. We collected and analyzed 6,548 customer reviews through our big data system to write the extra long drill bits for metal list. We found that most customers choose extra long drill bits for metal with an average price of £6.63.
The extra long drill bits for metal are available for purchase. We have researched hundreds of brands and picked the top brands of extra long drill bits for metal, including sourcing map, kwb, TOP-VIGOR, ANMOO, Saim. The seller of top 1 product has received honest feedback from 20,011 consumers with an average rating of 4.8.

Jennifer Fraser is a licensed contractor specializing in sales, maintenance, and kitchen, bathroom, and home appliances, tools, and utilities. She owns a store in Leeds where you can get any home and tool appliance. Jenny has a degree in literature, but she combines her knowledge and experience with her degree to publish DIY articles on solving home appliances issues to keep up the family enterprise.