A caster, also spelled castor, is commonly known as an un-driven, single, double, or compound wheel that is designed to be mounted to the bottom of a larger object. The purpose of a caster is to enable that larger object to be easily moved. HomElectrical also offers just the wheel of the caster for replacement purposes. With our variety of casters and wheels in a full selection of sizes and colors, you are sure to find everything you need to help with your material handling situations.