---
product_id: 259821209
title: "DMT D3EFC 3-inch Dia-Sharp Sharpener, Credit Card Sized- Extra-Fine, Fine and Coarse Diamond -Set of 3"
brand: "dmt"
price: "10.05 OMR"
currency: OMR
in_stock: true
reviews_count: 6
category: "Dmt"
url: https://www.desertcart.com.om/products/259821209-dmt-d3efc-3-inch-dia-sharp-sharpener-credit-card-sized
store_origin: OM
region: Oman
---

# Credit card sized, pocket-ready portability 3 diamond grit levels (9, 25, 45 micron) Sharpen dry or with water, no oil needed DMT D3EFC 3-inch Dia-Sharp Sharpener, Credit Card Sized- Extra-Fine, Fine and Coarse Diamond -Set of 3

**Brand:** dmt
**Price:** 10.05 OMR
**Availability:** ✅ In Stock

## Summary

> 💼 Sharpen your edge, sharpen your hustle — anytime, anywhere.

## Quick Answers

- **What is this?** DMT D3EFC 3-inch Dia-Sharp Sharpener, Credit Card Sized- Extra-Fine, Fine and Coarse Diamond -Set of 3 by dmt
- **How much does it cost?** 10.05 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/259821209-dmt-d3efc-3-inch-dia-sharp-sharpener-credit-card-sized)

## Best For

- dmt enthusiasts

## Why This Product

- Trusted dmt brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable USA-made construction ensures years of reliable, professional-grade performance
- • **Effortless & Fast:** Micronized monocrystalline diamond surface sharpens knives faster than traditional stones
- • **Mess-Free Maintenance:** Sharpen dry or with water—no oils, no hassle, just instant edge revival
- • **Precision Edge Mastery:** Three diamond grits from coarse to extra-fine for every sharpening need
- • **Anywhere, Anytime Sharpening:** Ultra-compact credit card size fits effortlessly in your wallet or pocket

## Overview

The DMT D3EFC Dia-Sharp Sharpener set features three credit card-sized diamond stones (coarse 45 micron, fine 25 micron, extra-fine 9 micron) designed for fast, oil-free sharpening. Its compact, durable design fits in your pocket or wallet, making it ideal for professionals who demand precision and portability. Made in the USA, this set delivers reliable, long-lasting performance for chefs, woodworkers, and tool enthusiasts alike.

## Description

Take your sharpening anywhere with the ready-to-go Dia-Sharp credit card sized diamond sharpener. Each one fits easily in pocket or wallet. Each comes in convenient vinyl color-coded carry case. Kit of 3: Coarse diamond (45 micron / 325 mesh) to quickly restore a neglected edge; Fine diamond (25 micron / 600 mesh) for a razor sharp edge; and Extra-Fine (9 micron / 1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond. Each: 3 1/4" x 2" x .05" Sharpening with diamonds is fast and easy. No messy oils needed—sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service. For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT products. Made in USA.

Review: Fast Delivery & great product - I received the package before the delivery date in good condition well packed
Review: 鹿の解体に使うナイフに毎日使っています。自宅でも職場でもナイフケースに入れて持ち歩けるので重宝しています。YouTubeでどこかの国のシェフさんかな、研いで絶賛されていてカードの使い方を見ることが出来ます。 毎朝、家を出る前に、ナイフをこのカード３枚で研ぎ、革砥で整えています。

## Features

- Pocket-sized convenience
- Three different diamond stones: Extra-Fine to polish and refine an edge, Fine for a razor sharp edge and Coarse to transform a dull edge
- Sharpens knives faster than conventional stones with DMT's micronized monocrystalline diamond surface
- No oil is needed-sharpen dry or with water
- Durable construction will provide years of performance and reliable service

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00006IIO3 |
| ASIN  | B00006IIO3 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #75,303 in Office Products ( See Top 100 in Office Products ) #470 in Pencil Sharpeners |
| Color | Multicolour |
| Country of origin  | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,335) |
| Customer reviews | 4.5 4.5 out of 5 stars (1,335) |
| Date First Available | 1 January 2024 |
| Date First Available  | 1 January 2024 |
| Department  | Unisex Adult |
| Grit Description | Extra Fine |
| Grit Rating | 9 |
| Included components | 1 x 3-inch Dia-Sharp Sharpener, Credit Card Sized- Extra-Fine, Fine and Coarse Diamond -Set of 3 |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 9.06 g |
| Item model number | D3EFC |
| Item model number  | D3EFC |
| Manufacturer | DMT |
| Manufacturer  | DMT |
| Material | Diamond |
| Measurement System | Metric |
| Number Of Pieces | 1 |
| Part number | D3EFC |
| Power source type | hand_powered |
| Product Dimensions | 24.13 x 12.7 x 8.26 cm; 9.07 g |
| Product Dimensions  | 24.13 x 12.7 x 8.26 cm; 9.07 g |
| Size | Small |
| Style | Extra-Fine, Fine and Coarse |

## Product Details

- **Brand:** DMT
- **Colour:** Multicolour
- **Item weight:** 0.32 Ounces
- **Material:** Diamond
- **Product dimensions:** 8.3L x 5.1W x 0.1H centimeters

## Images

![DMT D3EFC 3-inch Dia-Sharp Sharpener, Credit Card Sized- Extra-Fine, Fine and Coarse Diamond -Set of 3 - Image 1](https://m.media-amazon.com/images/I/81QJfBru5wL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: How brittle are these? I want to put one in my edc pouch that rides around in my cargo pocket. Will they snap easily if bumped or flexed?**
A: I don't think there is any danger of snapping the Dia-Sharp card by accident (or on purpose, for that matter).  The substrate appears to be steel, about 1.5x the thickness of a credit card, with the finishing surface diamond-impregnated.

**Q: Has anybody tried cutting these in half....to potentially double your usage time?.otherwise, i find the middle doesnt get used, just the edges. ThankS**
A: Never have tried to cut them in half. Haven't experienced your problem with wear either. love these little stones. They do wear out though.

**Q: Is there any abrasive on the card edges?**
A: Just had a look at mine--nope, no abrasive on the edge--the cards are really thin, so I don't there really could be, anyway.

**Q: Can the cards be modified in any way?  Like cutting down to size or drilling holes through them to attach to a lanyard or camping bag?**
A: They are just metal cards with an adhesive matrix that diamond chips are embedded into. You can cut or drill them as you want, but be careful so as to not knock the diamond chips loose from the card.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fast Delivery & great product
*by I***I on 13 November 2023*

I received the package before the delivery date in good condition well packed

### ⭐⭐⭐⭐⭐ Review
*by H***Y on 21 August 2025*

鹿の解体に使うナイフに毎日使っています。自宅でも職場でもナイフケースに入れて持ち歩けるので重宝しています。YouTubeでどこかの国のシェフさんかな、研いで絶賛されていてカードの使い方を見ることが出来ます。 毎朝、家を出る前に、ナイフをこのカード３枚で研ぎ、革砥で整えています。

### ⭐⭐⭐⭐⭐ Review
*by M***S on 7 January 2026*

Eu tirei foto dele embalado, mas já foi testado. Ele é do tamanho de um cartão e cada um vem dentro de uma capinha com cores diferentes, porque cada um é diferente.

## Frequently Bought Together

- Diamond Machining Technology (DMT) Dia-Sharp Diamond Sharpening Stone Credit Card, Extra Fine, Fine & Coarse, 3 Pack
- Trend Diamond Abrasive Lapping Fluid, 3.4 fl oz, Blue, Professional Grade Sharpening Fluid for Optimum Performance, DWS/LF/100
- DMT (Diamond Machining Technology) 2.5-in. DiaSharp Diamond Mini-Hone Sharpening Kit of Coarse, Fine, and Extra Fine Grit Sharpeners (D2K)

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**Shop now:** [https://www.desertcart.com.om/products/259821209-dmt-d3efc-3-inch-dia-sharp-sharpener-credit-card-sized](https://www.desertcart.com.om/products/259821209-dmt-d3efc-3-inch-dia-sharp-sharpener-credit-card-sized)

---

*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-03-09*