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?

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.

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

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.

Is there any abrasive on the card edges?

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.

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?

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.

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Description

💼 Sharpen like a pro, anywhere you go — because dull edges don’t belong in your toolkit.

BUILT TO LAST - Durable USA-made construction ensures years of reliable, professional-grade performance
POCKET READY DESIGN - Slim 3.25" x 2" stones fit effortlessly in your wallet or pocket
EFFORTLESS SHARPENING - Micronized monocrystalline diamond surface sharpens faster without oils
TRIPLE GRIT PRECISION - Coarse (45μ), Fine (25μ), Extra-Fine (9μ) diamonds for every edge need
COLOR CODED CONVENIENCE - Easy grit identification with vinyl carry cases for on-the-go use

The DMT Dia-Sharp 3-pack features credit card-sized diamond sharpening stones in coarse, fine, and extra-fine grits (45, 25, and 9 microns) designed for fast, oil-free edge restoration, honing, and polishing. Compact and color-coded for ultimate portability, these durable USA-made stones deliver professional-grade sharpening performance wherever your day takes you.

Specifications

Material	Diamond
Brand	DMT (Diamond Machining Technology)
Color	Blue, Clear, Red
Product Dimensions	3.25"L x 2"W x 0.05"H
Item Weight	0.32 Ounces
Grit Type	Coarse,Extra-fine,Fine
Number of Items	3
Manufacturer	DMT
Global Trade Identification Number	00017042007546
UPC	735090243289 017042007546 798167684781
Part Number	D3EFC
Item Weight	0.32 ounces
Item model number	D3EFC
Is Discontinued By Manufacturer	No
Size	Small
Power Source	hand_powered
Item Package Quantity	1
Number Of Pieces	1
Grit Rating	9
Included Components	DMT D3EFC 3-inch Dia-Sharp Sharpener, Credit Card Sized- Extra-Fine, Fine and Coarse Diamond -Set of 3
Batteries Included?	No
Batteries Required?	No
Warranty Description	Manufacturer Warranty

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