Z ZICOME Set of 6 Super Jumbo Plastic Clips for Keeping Towels Sheets Quilts Clothes from Blowing Away

Would these clips have a strong enough hold to hold carpet while its being pressure washed? And while its drying?

Would this work on the end of an ironing board to keep iron cord out of the way? I can't seem to find any product that gets good reviews. Thank you.

How wide are they fully opened? Could they hold a stack of receipts?

Is the spring on the clamp stainless steel?