The Oregon CS1500 Self-Sharpening corded electric chainsaw is outfitted with an 18-inch bar, the part of the saw that the cutting chain moves around. That's as long as you'll find on this type of saw.

Sold at Home Depot, Sears, and other retailers, Oregon's PowerSharp comes in several versions that differ according to a chain saw's bar length and whether you're retrofitting it for the first time.