10Pc Diamond Needle File Set 140mm – Mini Precision Files for Metal, Glass & Modelling

A versatile set of 10 precision diamond-coated needle files, designed for fine detail work on a variety of materials. Perfect for model railway enthusiasts, jewellery makers, and DIY crafters who need to smooth, shape, or finish small components with accuracy. Features: ✅ 10 different profiles – flat, round, triangular, half-round, square, and more. ✅ Diamond-coated tips – for long life and effective filing on hard materials. ✅ Fine detail size – slim 3mm shafts, 140mm length, ideal for precision work. ✅ Multi-material use – suitable for stone, glass, ceramic, metal, resin, and plastics. ✅ Essential modeller’s tool – clean up castings, fine-tune parts, or smooth glazing edges without damage. Specifications: Set: 10 diamond A versatile set of 10 precision diamond-coated needle files, designed for fine detail work on a variety of materials. Perfect for model railway enthusiasts, jewellery makers, and DIY crafters who need to smooth, shape, or finish small components with accuracy. Features: ✅ 10 different profiles – flat, round, triangular, half-round, square, and more. ✅ Diamond-coated tips – for long life and effective filing on hard materials. ✅ Fine detail size – slim 3mm shafts, 140mm length, ideal for precision work. ✅ Multi-material use – suitable for stone, glass, ceramic, metal, resin, and plastics. ✅ Essential modeller’s tool – clean up castings, fine-tune parts, or smooth glazing edges without damage. Specifications: Set: 10 diamond needle files Shank: ~3mm Material: Steel with diamond-coated surfaces Handle: Metal, easy to grip Perfect for: Model railway detailing & kit building Plastic, resin, or metal modelling work Jewellery & craft making Electronics repair & finishing edges Glass & stone carving

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FAQ – Product FAQs

General Product FAQs

What is included in this needle file set?

This set includes 10 precision diamond-coated needle files in a variety of profiles, such as flat, round, triangular, half-round, square, and more. Each file has a slim shaft of around 3mm and an overall length of about 140mm, making them ideal for fine detail work on small components.

What materials can I use these files on?

The diamond-coated surfaces are suitable for working on a wide range of materials, including stone, glass, ceramic, metal, resin, and plastics. They are particularly useful for model railway detailing, plastic and resin kits, jewellery making, and small DIY craft projects.

How are these files different from standard needle files?

These files have diamond-coated tips rather than traditional cut teeth. The diamond coating provides effective filing on harder materials like glass, stone, and ceramics, as well as metals and plastics, while offering a long working life and precise control on small parts.

Are these files suitable for model railway work?

Yes, they are ideal for model railway enthusiasts. The slim 3mm shafts and fine profiles allow you to clean up castings, fine-tune parts, and smooth glazing edges without damaging surrounding details. They are excellent for kit building, detailing, and general layout maintenance.

What are the dimensions and construction of the files?

Each file is approximately 140mm long with a shank of about 3mm. They are made from steel with diamond-coated surfaces and a metal handle area that is easy to grip, giving you good control for precise work on small components.

Who are these files best suited for?

These files are designed for anyone who needs accurate, fine detail work, including:

• Model railway builders and detailers
• Plastic, resin, and metal modellers
• Jewellery makers and craft hobbyists
• Electronics repairers and tinkerers
• Glass and stone carvers working on small features

Troubleshooting FAQs

My file doesn’t seem to be cutting very well. What should I check?

First, make sure you are using light, controlled strokes and letting the diamond surface do the work. Check that you are working on a material suitable for diamond files (such as metal, resin, plastic, glass, stone, or ceramic). Also ensure the file surface is not clogged with debris; gently brushing it clean can restore performance.

The file surface looks clogged with dust. How can I clean it?

You can clean the file by gently brushing along the length of the file with a soft brass or stiff nylon brush to remove debris from between the diamond particles. Avoid harsh scrubbing across the file, which can wear the coating prematurely. A quick rinse and thorough dry afterwards can also help keep the surface clear.

I’m getting scratches where I only want a smooth finish. What am I doing wrong?

Diamond files are naturally aggressive for their size, so use lighter pressure and shorter strokes as you approach the final finish. Work in one consistent direction rather than sawing back and forth. On plastics and resins, reduce pressure further and finish with finer abrasives or polishing sticks after filing if you need an ultra-smooth surface.

The file feels uncomfortable or slippery when I’m working. Any tips?

Ensure your hands are clean and dry before using the files. Because the handle area is metal, you may find a slightly looser grip with more finger control works better than squeezing tightly. For longer sessions, many modellers simply wrap the handle area with a thin layer of tape or a removable grip sleeve for extra comfort and control.

I’m worried about damaging delicate parts on my model. How can I work safely?

Choose the smallest profile that suits the area you are working on and use gentle, controlled strokes. Support the part firmly, ideally on a stable surface, and work slowly, checking progress frequently. It is better to remove material in several light passes than to try to achieve the final shape in one go.

Assembly & Painting FAQs

How can I use these files when assembling model railway kits?

These files are excellent for preparing parts before gluing or fitting. Use them to:

• Remove mould lines and casting flash on plastic, resin, or metal parts
• Fine-tune joints and tabs for a better dry fit
• Square up edges and openings for a more precise assembly
• Adjust coupler pockets, bogie mounts, and small mechanical interfaces

What’s the best way to prepare surfaces for painting with these files?

Use the finer profiles to gently smooth seams, sprue attachment points, and any rough areas that would show under paint. Work lightly to avoid deep scratches. After filing, remove dust with a soft brush or cloth, then wash the parts if needed so that primer and paint adhere cleanly to the surface.

Can I use these files on clear glazing without ruining it?

Yes, but use a very light touch and only where necessary, such as on edges or to adjust fit. File gently along the edge rather than across the surface. After filing, you can follow up with progressively finer abrasives or polishing compounds to restore clarity if any fine marks are visible.

Which file profiles are most useful for model assembly work?

Different profiles suit different tasks:

• Flat files: levelling surfaces, cleaning flat joints, and squaring edges
• Round files: opening out holes and smoothing curves
• Triangular files: sharpening corners and working into tight angles
• Half-round files: combining flat and curved work on complex shapes
• Square files: refining slots and recesses

How should I finish filed areas before final paint or weathering?

After shaping with the diamond files, check the area under good light. If you see visible file marks, refine the surface with finer abrasives or sanding sticks. Once smooth, remove all dust, apply a suitable primer, and then proceed with your chosen paint and weathering, confident that the underlying surface is clean and well-prepared.