This Impact 25mm Caster Set is designed to ease placement of any standard light stand with tubular 25mm diameter leg endings. They mount easily with a simple twist of the wing nuts, without the necessity of additional tools.
In general, these casters are not designed to work with C-stands. The angle of the casters will not match up with those of C-stands.
In the Box
Impact Caster Set for Light Stands with 25mm Tubular Leg Ends (Set of 3)