Wood chippers are typically powered by either gas or electricity, and the size of the machine will depend on the type of wood being chipped. They come in different sizes and capacities, ranging from small units for home use to industrial-grade machines for commercial applications. Wood chippers usually have a feed chute where the operator can insert branches, twigs, and other wood debris. Once inside, the wood is shredded into small pieces by the machine's sharp blades, which rotate at high speeds.