Best Extra Long Drill Bits for Metal of 2025

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 1 Feb 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

sourcing map HSS Extra Long Twist Drill Bits Cover #TOP 1
sourcing map HSS Extra Long Twist Drill Bits
ftb score rating icon 9.9
sourcing map HSS Extra Long Drill Bits Cover #TOP 2
sourcing map HSS Extra Long Drill Bits
ftb score rating icon 9.8
sourcing map HSS Extra Long Twist Drill Bits Cover #TOP 3
sourcing map HSS Extra Long Twist Drill Bits
ftb score rating icon 9.6

Top 10 Extra Long Drill Bits for Metal

#TOP 1

sourcing map HSS Extra Long Twist Drill Bits

a22031100ux0262
4x160mm
sourcing map HSS Extra Long Twist Drill Bits Cover
sourcing map HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 160mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs

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.

What We Like
High-speed steel construction
Improved cutting accuracy
Suitable for various materials
Longer drilling life
Works with multiple drill types
#TOP 2

sourcing map HSS Extra Long Drill Bits

a22031100ux0314
6x300mm
sourcing map HSS Extra Long Drill Bits Cover
sourcing map HSS(High Speed Steel) Extra Long Twist Drill Bits, 6mm Drill Diameter 300mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs

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.

What We Like
Long-lasting high-speed steel
Improved cutting accuracy
Suitable for various materials
Avoids drill bit displacement
Convenient for DIY and professionals
#TOP 3

sourcing map HSS Extra Long Twist Drill Bits

HSS-3.5x100-3.5x160-6SP-GD
3.5x160mm
sourcing map HSS Extra Long Twist Drill Bits Cover
sourcing map HSS(High Speed Steel) Extra Long Twist Drill Bits, 3.5mm Drill Diameter 160mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 6 Pcs

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.

What We Like
High-speed steel construction
Twisted design for accuracy
Suitable for various materials
Ideal for DIY and professionals
Longer drilling life
#TOP 4

sourcing map 3mm Extra Long Drill Bits

a22031100ux0265
3x200mm
sourcing map 3mm Extra Long Drill Bits Cover
sourcing map HSS(High Speed Steel) Extra Long Twist Drill Bits, 3mm Drill Diameter 200mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs

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.

What We Like
High-speed steel construction
Enhanced cutting accuracy
Suitable for various materials
Efficient debris removal
#TOP 5

sourcing map HSS Extra Long Drill Bits

a22031100ux0322
8x250mm
sourcing map HSS Extra Long Drill Bits Cover
sourcing map HSS(High Speed Steel) Extra Long Twist Drill Bits, 8mm Drill Diameter 250mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 2 Pcs

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.

What We Like
Long-lasting high-speed steel
Enhanced cutting accuracy
Efficient debris removal
Versatile for various materials
Suitable for multiple drill types
#TOP 6

kwb Extra Long HSS Metal Drill Bit

kwb
217-080
8 mm
kwb Extra Long HSS Metal Drill Bit Cover
kwb HSS Metal Drill Bit Ø 8 mm, Extra Long, Right-Cutting, Pointed Tip, Drill Machine Accessory

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.

What We Like
Precision drilling capability
Versatile for multiple materials
Easy to start with pointed tip
Durable for long-lasting use
#TOP 7

sourcing map HSS Extra Long Drill Bits

a22022300ux0045
4x200mm
sourcing map HSS Extra Long Drill Bits Cover
sourcing map HSS(High Speed Steel) Extra Long Twist Drill Bits, 4mm Drill Diameter 200mm Length for Hardened Metal Woodwork Plastic Aluminum Alloy 6 Pcs

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.

What We Like
Durable high-speed steel construction
Twisted design improves accuracy
Suitable for various materials
Longer drilling life
Easy debris removal
#TOP 8

TOP-VIGOR 4.2mm Extra Long Twist Drill Bits

TK4339JP4
4Pcs
4.2mm x 160mm
TOP-VIGOR 4.2mm Extra Long Twist Drill Bits Cover
TOP-VIGOR 4Pcs 4.2mm Dia Extra Long Twist Drill Bits, 160mm Length High Speed Steel Extended Spiral Drill Bit, Straight Shank Twist Drill Bit Tool for Wood Metal Aluminum Plastic

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.

What We Like
Durable high-speed steel material
Fast and precise drilling
Compatible with various tools
Suitable for multiple materials
Extended length for deeper holes
#TOP 9

ANMOO 6Pcs Extra Long Twist Drill Bit Set

ELTDB003
ANMOO 6Pcs Extra Long Twist Drill Bit Set Cover
ANMOO 6Pcs Extra Long Twist Drill Bits, 4mm Drill Diameter 160mm Length HSS(High Speed Steel) Drill Bit Set for Hardened Metal, Woodwork, Plastic, Aluminum Alloy

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.

What We Like
Improved cutting accuracy
Durable high-speed steel
Suitable for various materials
Works with multiple drill types
#TOP 10

Saim Extra Long HSS Twist Drill Bits

Long Twist Bits
Silver
4.5mm
Saim Extra Long HSS Twist Drill Bits Cover
Saim Extra Long Twist Drill Bits,4Pcs HSS(High Speed Steel) Drill Bits 4.5mm Diameter 160mm Length for Hardened Metal Woodwork Plastic aluminum alloy

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.

What We Like
High-speed steel construction
Improved cutting accuracy
Fast debris removal
Versatile for various materials
Suitable for multiple drilling tools
Buying Guide Image

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.

Editor's Notes

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.

Written by
Jennifer Fraser Avatar

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.