Chainsaw

A chainsaw (or chain saw) is a portable mechanical saw, typically powered by a two-stroke engine. It is used for cutting trees, to fell snags, to cut firebreaks in wild land fires, and to harvest firewood. Special chainsaws are used for cutting concrete.
Parts.
A chainsaw has several parts, including:
As chainsaw carving has become more popular, the makers of chainsaws are making special short, narrow-tipped bars for carving. These are called "quarter tipped," "nickel tipped" or "dime tipped" bars, based on the size of the round tip. After sometime the chainsaw chain gets dull.