Best Diamond Flat Files of 2025

Jennifer Fraser Avatar
Jennifer Fraser
Last Updated: 1 Feb 2025

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If you're looking for a high-quality tool to help you shape and smooth various materials, then the Diamond Flat Files may be worth considering. These flat files are made with diamond abrasive particles that are electroplated onto a stainless steel base, providing a durable and long-lasting tool. They come in a variety of shapes and sizes to suit different applications, from fine detail work to larger surface areas. Whether you're working with wood, metal, ceramics, or plastics, the Diamond Flat Files can help you achieve a precise and smooth finish.

At a Glance: Our Top Picks

sourcing map Diamond Needle Files with TPU Handle Cover #TOP 1
sourcing map Diamond Needle Files with TPU Handle
ftb score rating icon 9.9
Sourcingmap 10Pcs Flat Diamond Needle Files Cover #TOP 2
Sourcingmap 10Pcs Flat Diamond Needle Files
ftb score rating icon 9.8
sourcing map Diamond Coated File 80 Grit for Grinding Cover #TOP 3
sourcing map Diamond Coated File 80 Grit for Grinding
ftb score rating icon 9.6

Top 10 Diamond Flat Files

#TOP 1

sourcing map Diamond Needle Files with TPU Handle

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Gold Tone, Blue
4mm x 160mm
sourcing map Diamond Needle Files with TPU Handle Cover
sourcing map Diamond Needle Files, 4mm x 160mm Titanium Coated Flat Files Hand Tool with TPU Handle for Metal Stone Wood

The sourcing map Needle Files are designed for precision in shaping and polishing various materials, including metal, wood, and stone. With a diamond-plated length of 50mm, these files have sharp, durable teeth for effective use on delicate projects. The titanium coating enhances wear resistance and reduces friction, ensuring a smoother filing experience. The comfortable TPU handle provides a firm grip, making it easier for you to work for extended periods, even in moist conditions.

What We Like
Durable diamond-plated teeth
Corrosion-resistant titanium coating
Comfortable TPU handle
Suitable for delicate projects
Effective on multiple materials
#TOP 2

Sourcingmap 10Pcs Flat Diamond Needle Files

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Silver
Sourcingmap 10Pcs Flat Diamond Needle Files Cover
Sourcingmap 10Pcs 2mm x 100mm Flat Diamond Needle File 150 Grit

The Sourcingmap Diamond Needle Files are perfect for fine detail work, measuring 100mm in total length with a 40mm diamond-plated area. With a diamond grit of 150, these flat files allow you to effectively shape and smooth materials such as steel, glass, and stone. The nonslip plastic dipped handle ensures a comfortable grip, making it easier for you to control your filing tasks with precision. These mini files are ideal for anyone who values accuracy in their projects.

What We Like
Effective for fine detail work
Nonslip comfortable grip
Suitable for various materials
Compact and easy to handle
#TOP 3

sourcing map Diamond Coated File 80 Grit for Grinding

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6 Inch
sourcing map Diamond Coated File 80 Grit for Grinding Cover
sourcing map Diamond Coated File 6 Inch 80 Grits Flat Files Tools with Plastic Handle for Metal Glass Wood Stone Grinding Polishing Engraving

The sourcing map Diamond File measures 6 inches, making it a convenient tool for various tasks. Its diamond-coated surface ensures sharpness and durability, providing effective grinding and polishing for materials like glass, metal, and stone. The ergonomic plastic handle offers comfort and prevents slipping during use, enhancing your control. Additionally, the file's size and design allow for easy handling and storage, making it ideal for both professional and DIY projects.

What We Like
Durable diamond-coated surface
Ergonomic anti-slip handle
Versatile for multiple materials
Compact and easy to store
#TOP 4

sourcing map Diamond Coated 6 Inch File

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6 Inch
sourcing map Diamond Coated 6 Inch File Cover
sourcing map Diamond Coated File 6 Inch 80 Grits Half Round Files Tools with Plastic Handle for Metal Glass Wood Stone Grinding Polishing Engraving

The sourcing map Diamond File is a versatile tool designed for various applications. Its 6-inch blade size allows for efficient grinding, polishing, and engraving on materials like glass, metal, and stone. The diamond alloy construction ensures sharpness and durability, making it suitable for tough jobs. Additionally, the ergonomically designed plastic handle provides a comfortable grip, reducing fatigue during extended use. There is also a hanging hole for convenient storage, making it easy for you to keep your workspace tidy.

What We Like
Durable diamond alloy construction
Ergonomic and comfortable handle
Versatile for multiple materials
Easy storage with hanging hole
#TOP 5

6-Inch Diamond Coated Flat File with Comfort Grip

6-Inch Diamond Coated Flat File with Comfort Grip Cover
6-Inch Diamond Coated Flat File, Medium #150 Grit, for Glass, Tile, Ceramic and Stone, Granite, Marble, Concrete, Big Comfort Massage Handle Grip, Total Length 10.4-Inches, Glass Ceramic Tile File

The FITOOL Diamond Flat File features high-quality diamond grit that ensures efficient and durable filing on various materials, including glass and ceramic. Its medium #150 grit surface allows you to achieve a smooth finish effortlessly. The ergonomic soft grip handle provides comfort during use, reducing hand fatigue. With its convenient hanging holes, storage becomes a breeze. This file's versatility makes it suitable for both professional and hobbyist applications, making your tasks more manageable and enjoyable.

What We Like
High-quality diamond grit
Ergonomic comfort grip
Convenient storage options
Versatile for various materials
#TOP 6

Orbitron 2pcs Diamond File Set with Grip

Diamond File Set
Orbitron 2pcs Diamond File Set with Grip Cover
2pcs Diamond File Set Half Round & Taper Flat Stone Glass Metal Tiles Soft Grip

The Orbitron Diamond File Set includes two essential tools: a half round taper and a flat diamond coated file. With a 120 grit, these files are perfect for smoothing edges on various materials, including stone, glass, and metal. The comfortable grip handles make them easy to use, ensuring that you can work for extended periods without discomfort. Each file features a blade length of approximately 100mm, providing you with the precision needed for detailed tasks. This set is an excellent addition to any toolkit.

What We Like
Two essential file types included
Comfortable grip handles
120 grit for effective smoothing
Versatile for various materials
Precision blade length
#TOP 7

Plentoy 2Pcs Flat Diamond Needle File Set

Plentoy 2Pcs Flat Diamond Needle File Set Cover
2Pcs 4mm x 160mm Flat Diamond Needle File 120 Grit for Metal Glass Stone Jewelry Making

The Plentoy Diamond Needle Files are designed for precision filing and shaping of various materials, including steel, glass, and stone. Each file measures 160mm in total length, making them easy to handle. The 120 grit diamond coating allows for efficient material removal, ensuring a smooth finish. With a non-slip plastic dipped handle, you will enjoy a comfortable grip, enhancing control during use. This makes them an ideal choice for jewellery making and other detailed crafting tasks.

What We Like
Durable diamond grit
Comfortable grip handle
Versatile for various materials
Includes two files
#TOP 8

Marksman 2PC Diamond File Set - Flat & Tapered

56006c
Marksman 2PC Diamond File Set - Flat & Tapered Cover
2PC DIAMOND FILE SET NEEDLE HALF ROUND TAPERED & FLAT STONE METAL GLASS 120MM

The Marksman Diamond File Set is a versatile tool for various crafting and DIY tasks. This set includes a half-round tapered file and a flat file, providing you with options for different filing needs. The diamond-coated surfaces ensure efficient material removal, making your projects smoother and quicker. Each file measures 120mm, allowing for precise control in tight spaces. With this set, you can easily shape and finish metal, glass, and stone, making it a convenient addition to your toolkit.

What We Like
Versatile for multiple materials
Efficient diamond-coated surfaces
Compact 120mm size
Includes tapered and flat designs
Ideal for crafting and DIY
#TOP 9

sourcing map Diamond Needle Files Set

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Gold Tone, Blue
4.5mm x 180mm
sourcing map Diamond Needle Files Set Cover
sourcing map Diamond Needle Files, 4.5mm x 180mm Titanium Coated Flat Type File Handles Hand Tool for Metal Wood Stone Marble 4pcs

The sourcing map Needle Files are ideal for shaping and polishing various materials, including metal, wood, and stone. With their diamond-plated tips, these files offer high hardness and durability, ensuring you achieve precise results on delicate projects. The PVC plastic dipped handle provides a comfortable and secure grip, making it easy to use even in moist conditions. Additionally, the titanium coating enhances wear resistance and prevents rust, giving you a reliable tool that lasts for a long time.

What We Like
Durable diamond-plated tips
Comfortable PVC handle
Versatile for multiple materials
Rust-resistant titanium coating
#TOP 10

SE 74330DF 6-Piece Diamond File Set

SE
74330DF
SE 74330DF 6-Piece Diamond File Set Cover
SE 74330DF 6-Piece Flat Diamond Grit File Set - Multi-Grit for Metals, Glass, Stones - 7" Length, 2" Diamond Surface, Round Handles - Includes PVC Pouch

The SE Diamond Grit File Set is an essential tool for your crafting needs. With a versatile grit range from 40 to 600, you can achieve precise filing and shaping on metals, glass, and stones. Each file features an industrial diamond coating, providing a hard abrasive surface that ensures effective material removal. Their 7-inch length and 2-inch usable diamond surface make them perfect for detailed work in metalworking and mould making. Plus, the round dipped handles offer a comfortable grip, reducing hand fatigue during extended use.

What We Like
Variety of grit options
Industrial diamond coating
Ideal for precision work
Comfortable grip handles
Includes storage pouch
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are diamond files good for?

Triatic diamond files are used for deburring, notching, dressing and honing hard, brittle materials such as hard steels, glass, and ceramic. Unlike traditional steel files, these files do not have teeth, but diamond grit.

2. Are diamond files better?

Diamond Files cut in all directions, produce a better finish The distribution of diamond particles enables the diamond needle file to not only cut in all directions but also produce a much better finish. Therefore diamond needle files can offer a fantastic abrasive for a variety of applications.

3. How long does a diamond file last?

If diamond stones are properly maintained, meaning they are kept clean and stored dry, they can last a long time. For those that use stones on a daily basis and maintain them properly, the diamond will likely last years. For those that use them regularly, it's likely the stone will last from ten to twenty years.

4. What is a diamond hand file?

Diamond Files & Sets Hand files and sets are used to smooth and shape wood and metal. A round file is a tapered tool that can enlarge round holes and smooth intricate edging, especially in fine furniture work.

Editor's Notes

During our diamond flat file research, we found 266 diamond flat file products and shortlisted 10 quality products. We collected and analyzed 7,350 customer reviews through our big data system to write the diamond flat files list. We found that most customers choose diamond flat files with an average price of £7.23.

The diamond flat files are available for purchase. We have researched hundreds of brands and picked the top brands of diamond flat files, including sourcing map, Uxcell, FITOOL, Orbitron, Plentoy. The seller of top 1 product has received honest feedback from 20,000 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.