Will these fit my light stand?

They suit stands with a flat base plate or feet that accept a bolt. Check the diameter of your stand's foot and the bolt size before ordering, since base designs vary between brands.

Do they work on carpet?

Only with effort. Small hard casters sink into pile and drag on carpet; they roll best on concrete, tile, laminate and studio flooring.

Can I leave a sandbag on the stand while it's on wheels?

Light sandbags are usually fine, but heavy weights on small casters can flatten or bind the wheels. For tall or heavily weighted stands, lift the bag off before rolling.

How many casters come in the pack?

Three. That is enough for a tripod-footed stand; a four-legged base needs a second pack.

No. These are plain swivel casters without brakes, so a stand can drift on a sloped or slick floor. Chock the wheels or lower the load if that matters.