These washers (except M10) are not stainless steel. They are strongly attracted to a magnet, like ordinary steel. Stainless steel is not magnetic. Stainless steel refrigerators have a steel plate behind the door that you can attach magnets to. Maybe they have some kind of stainless steel washer in the kit, they claim stainless steel washers. Test them yourself and judge.
π· Fermtech Double Blast Wine Rinser & Beer Bottle Washer β Kitchen, Lab, Bar Glass Cleaner with Laundry Tub Faucet Adapter (Black) β Wine Cleaning Equipment for Better Maintenance
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π© FullerKreg 5/8" x 1-3/4" OD Stainless Flat Fender Washers, 1-3/4" Outside Diameter, 0.120" Thickness, 6 Pack, 18-8 (304) Stainless Steel
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π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
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