What is a caster? What are the functions of casters?

Casters, also known as universal wheels, are a common accessory that is typically used for the movement of a variety of equipment, furniture, and carts. The design of casters allows these devices to be easily moved in indoor or outdoor environments without leaving marks on the floor like traditional sliding devices.

The purpose of casters is to allow equipment to be moved easily over a variety of terrains and surfaces. Due to the flexibility and adjustability of casters, they can be adapted to different flooring conditions, including smooth hard floors, carpeting, stone, sand and more. Additionally, casters can help reduce friction and resistance when moving equipment, thereby reducing wear and damage to the equipment.