Casters

noun

1. Someone or something that casts

   "a caster of spells; a caster of stones; a caster of bronze statuary; an online caster of video games"

2. A wheeled assembly attached to a larger object at its base to facilitate rolling. A caster usually consists of a wheel (which may be plastic, a hard elastomer, or metal), an axle, a mounting provision (usually a stem, flange, or plate), and sometimes a swivel (which allows the caster to rotate for steering).

   "Many office chairs roll on a set of casters."

3. A shaker with a perforated top for sprinkling condiments such as sugar, salt, pepper, etc.

   "a set of casters"

4. A stand to hold a set of shakers or cruets.
5. The angle of the axis around which a car's front wheels rotate when the steering wheel is turned, with a vertical axis being defined as zero caster.