Chainsaw is new edge technology for cutting tress. It helps to reduce labour cost and time. Chainsaw comes in electric and petrol subcatagories. Electric chainsaw may be run through generator but petrol chainsaw need not to have generator or other power source. Petrol chainsaw having its own engine which could be through petrol fuel. Petrol chainsaw comes with 2 stroke petrol engne and 4 stroke gasoline engine. Chainsaw makes tree cutting smoth.