what are these? Are they like 3M green or maroon pads? Do they wear out? are they harder than the steel of the knife (scratch)? scouring powder?

their like rubber erasers with fine abrasive. Their not like the 3m scotchpad if that is what your referring too. They last for a long time but they do wear out over time. The abrasive HAS to be harder then the rust and steel otherwise its a useless product.

Can I leave them soaking? Will it deteriorate?

don`t soaking...just little water with knife and than sharpen a blade...

Can i use these to clean spyderco sharpening stones?

I use the medium white one to cealn my suehiro water bench stones and it works great so it should work fine on the spyderco items. The fine red one is only good for getting rust off a blade after you used the white one. For stone cleaning use only the white one

Is it really necessary to use a medium and a fine? Thank You!!

It depends on the amount of rust or scratches. For heavier abrasions it's easier to start with the medium and finish with the fine. Soo in some cases it is better to have both.

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🛠️ Rust-free knives, zero hassle—be the kitchen hero everyone envies!

DUAL GRAIN POWER - Medium and fine grains tackle rust from stubborn to subtle.
COMPACT PORTABLE - Small 1.5"x2.5" size fits perfectly in any kitchen drawer.
FAST ACTING FORMULA - Just a 10-minute cold water soak preps it for action.
TRUSTED CRAFTSMANSHIP - Kuniyoshi quality ensures reliable, long-lasting rust removal.
EFFORTLESS RESTORATION - Removes tough rust without scrubbing pain or damage.

The Kuniyoshi Rust Eraser Sabitoru Medium and Fine 2-piece Set features dual-grain blocks designed for efficient rust removal on knives. Simply soak in cold water for 10 minutes, then gently scrub to restore blades without damage. Compact and lightweight, this set offers a professional-grade solution for maintaining pristine kitchen tools.

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Manufacturer	Kuniyoshi
Brand	Kuniyoshi
Model number	8541909070
Product Dimensions	6.35 x 3.81 x 1.27 cm; 82 g
Color	Gray
Shape	Rectangular
Material Type	Plastic, Rubber
Manufacturer Part Number	SG_B00FS0BFJC_US
Item Weight	82 g

Kuniyoshi Rust Eraser Sabitoru Medium and Fine 2-piece Set

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