Niwaki Twin Diamond File
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Niwaki Twin Diamond File is a double-sided diamond file designed for coarse sharpening and restoring damaged or tired tool blades. It's the ideal first step when secateurs, shears and other garden tools have become chipped, blunt or neglected.
One side features a very coarse #120 grit, ideal for removing metal quickly when repairing nicked or damaged cutting edges. The reverse has a finer #300 grit, leaving a working edge ready to be refined further on a sharpening stone.
Use it dry to restore secateurs, shears, knives and other garden tools, or for sharpening rougher edges such as mower blades. Compact, lightweight and easy to carry, it's an essential addition to any serious gardener's tool maintenance kit.
Complete your tool care kit: Remove sap, rust and resin with Niwaki Mini Clean Mate, protect blades with Camellia Oil, and refine the edge after coarse sharpening with a Niwaki #1000 Sharpening Stone.
- Material: Electroplated diamond
- Grit: #120 (coarse) and #300 (medium)
- Size: 217 × 18 × 5mm
- Weight: 50g
- Made in: Japan
- Use: Coarse sharpening, repairing damaged edges and restoring tired blades
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Standard UK Delivery
Tracked delivery within 1–3 working days to most UK postcodes (excl. Northern Ireland).
Orders under £15 – £5.95
Orders £15–£34.99 – £4.95
Orders £35–£49.99 – £3.95
Orders £50+ – FREE
Local Hand Delivery (Edinburgh)
£7.95 flat rate. Monday–Friday delivery to EH1–EH22, EH28 and EH29. Select your delivery date at checkout. Required for large plants, terrariums and fragile items.
Store Pickup
Free collection within 1 hour from our St Vincent Street shop (EH3 6SH).
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meet the plant gurus
At grow urban, we're passionate about helping people create greener, happier homes through plants.
From our Edinburgh plant shop, our team of Plant Gurus carefully hand-pick every plant and botanical product we sell, ensuring it arrives looking its very best.
Whether you're searching for your first houseplant or adding to an ever-growing collection, we're here to share expert advice and help your plants thrive.
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what to expect when you order
We offer happy, healthy plants that are carefully hand-picked and delivered straight to your door from our plant shop.
We will deliver to you in recyclable boxes and we use paper materials and compostable bubble wrap! Our Plant Gurus will ensure that your plants are safe and secure for the journey to their new home!