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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🛠️ Erase rust, not your time — the smart way to restore your blades!

COMPACT PORTABLE - Small, lightweight design fits perfectly in any kitchen or tool kit.
QUICK SOAK ACTIVATION - Just 10 minutes in cold water unlocks maximum rust-fighting power.
TRUSTED CRAFTSMANSHIP - Kuniyoshi quality ensures durability and consistent performance every time.
DUAL TEXTURE PRECISION - Medium and fine grains tackle both heavy and delicate rust spots flawlessly.
EFFORTLESS RUST REMOVAL - Say goodbye to scrubbing pain with a gentle yet powerful rust eraser.

The Rust Eraser Sabitoru Medium and Fine 2-piece Set by Kuniyoshi offers a user-friendly, efficient solution for removing tough rust from knives. Featuring medium and fine grain resin blocks measuring 2.5 x 1.5 x 0.5 inches, this compact set requires only a 10-minute cold water soak to activate, delivering precise rust removal without harsh effort. Lightweight and durable, it’s an essential tool for maintaining sharp, rust-free blades.

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Manufacturer	CKK
Brand	Kuniyoshi
Item Weight	2.89 ounces
Product Dimensions	2.5 x 1.5 x 0.5 inches
Item model number	8541909070
Is Discontinued By Manufacturer	No
Color	Grey
Shape	Rectangular
Material Type	Resin
Manufacturer Part Number	SG_B00FS0BFJC_US

Rust Eraser Sabitoru Medium and Fine 2-piece Set

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