A chainsaw machine is a portable mechanical saw that is powered by a gasoline engine, electricity or battery. The machine typically features a cutting chain consisting of a series of linked metal teeth that rotate around a guide bar. The operator holds the machine with both hands, positions the guide bar on the material to be cut, and applies pressure to the machine to make the cut. Chainsaw machines are commonly used in forestry and tree removal, as well as in construction and demolition work.