What is the diameter at the ends please ?

The diameter at the tip is 1.72mm. One centimeter from the tip 2.16mm. At the base its 6.25mm in the middle its 4.17mm.

Which is better for a sub shun bread knife? Fine or extra fine?

I would use the fine grit. This will work allmost up to razor sharpness. Make sure you break the grit off, by grinding against the structure of the cutting edge. (Sorry for my english, i can not explain it better than this, but i hope it will help you) Greetings from Germany Nandger from Schmiedeglut

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DMTFSKF Fine Diafold Serrated Knife Sharpener, Color May Vary

DMTFSKF Fine Diafold Serrated Knife Sharpener, Color May Vary

Product ID: 48560131

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Details

Material
Diamond
Brand
DMT
Colour
Color May Vary
Product dimensions
24.1L x 12.7W
Item weight
0.64 Ounces
Grit type
Fine

💎Micronized monocrystalline diamond surface

🪶Lightweight at just 18.1g

🛡️Fold & go handle protects sharpener

Description

💎 Sharpen smarter, not harder—your knives deserve the diamond touch!

BUILT TO LAST - Durable construction ensures years of reliable, high-performance sharpening.
NO MESS NO FUSS - Sharpen dry or with water—no oil needed for a clean, hassle-free experience.
PROTECTIVE FOLD GO - Encloses the sharpener safely when not in use, perfect for on-the-go pros.
ULTRA PORTABLE DESIGN - Compact and featherlight for effortless carry—sharpen anywhere, anytime.
DIAMOND PRECISION EDGE - Achieve razor-sharp serrated knives faster than traditional stones with DMT’s fine diamond grit.

The DMTFSKF Fine Diafold Serrated Knife Sharpener features a micronized monocrystalline diamond surface that sharpens serrated knives faster and more efficiently than conventional stones. Weighing only 18.1 grams, its foldable handle protects the sharpener for easy portability. No oil is required, allowing dry or wet sharpening with durable construction designed for long-lasting performance.

Specifications

Manufacturer	Acme United Corporation
Part Number	DMTFSKF-BRK
Product Dimensions	24.13 x 12.7 x 8.26 cm; 18.14 g
Item model number	FSKF
Size	M
Colour	Color May Vary
Style	Fine
Material	Diamond
Item Package Quantity	1
Number of Pieces	1
Measurement System	Metric
Grit Number	1
Grit Description	Fine
Included Components	1 x Diafold Serrated Knife Sharpener - Fine
Batteries included?	No
Batteries Required?	No
Item Weight	18.1 g

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