Slow Dolphin Heavy Duty Spring Clamps Clip 4.5 Inch for Muslin/Paper Photo Studio Backdrops Background-6 Pack（Yellow & Black）

Will these fit around a 2x4 wood?

Will these work to hold a solar blanket on a 18x9 pool?

Will these grip on to a 5/8” pipe?

Would these work to hold patio furniture covers in high winds? I would wrap cover aroung chair leg and clamp only fabric to keep it around leg. thx