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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Kuniyoshi Rust Eraser Sabitoru Medium and Fine 2-piece Set

Product ID: 285905858

Details

Brand
Kuniyoshi
Colour
Gray
Material
Plastic Rubber
Product dimensions
6.4L x 3.8W
Recommended uses for product
Removing Rust

⏳Quick 10-min soak activation

🧽Effortless rust removal

⚙️Dual-grain precision (medium & fine)

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678 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Erase rust, not your style — keep your knives sharp and sleek!

DUAL GRAIN POWER - Medium and fine grains tackle rust from stubborn to subtle.
FAST ACTING FORMULA - Just a 10-minute cold water soak preps it for action.
GENTLE YET EFFECTIVE - Removes rust without scratching or painful scrubbing.
COMPACT LIGHTWEIGHT - Portable 2-piece set fits perfectly in any kitchen drawer.
TRUSTED BRAND QUALITY - Kuniyoshi’s reliable craftsmanship ensures lasting knife care.

The Kuniyoshi Rust Eraser Sabitoru Medium and Fine 2-piece Set offers a dual-grain solution for removing tough rust from knives with minimal effort. Simply soak the erasers in cold water for 10 minutes, then gently scrub away rust without damaging the blade. Compact and lightweight, this gray rectangular set is designed for easy, effective maintenance, making it a must-have for any kitchen professional or enthusiast aiming to preserve their cutlery’s peak performance.

Specifications

ASIN	B00FS0BFJC
Additional Features	Non-Abrasive
Best Sellers Rank	#49,709 in Kitchen ( See Top 100 in Kitchen ) #110 in Kitchen Knife Sets
Brand Name	Kuniyoshi
Color	Gray
Customer Reviews	3.0 3.0 out of 5 stars (1)
Item Dimensions L x W	6.4L x 3.8W centimeters
Item Shape	Rectangular
Manufacturer	Kuniyoshi
Material Type	Plastic, Rubber
Model Name	Kuniyoshi Rust Eraser Sabitoru
Number of Pieces	2
Recommended Uses For Product	Removing Rust
UPC	793842085549 720825456744
Unit Count	2 Count

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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