Biodiversity is the variety of different types of life found on Earth and the variations within species. It is a measure of the variety of organisms present in different ecosystems. This can refer to genetic variation, ecosystem variation, or species variation (number of species) within an area, biome, or planet.
Craftsman is one of the leading brands of gas and electric chain saws. Craftsman chain saws come in a variety of bar lengths, from 10 inches to 20 inches, and are geared to the consumer market. The Craftsman electric chain saws have smaller bar lengths than their gas counterparts.
STIHL saw chains are 'Swiss precision-made' at the STIHL factory in Wil. They are made using special machinery developed and built in-house by STIHL.