Automatic gear driven chain oiler for consistent lubrication to bar and chain anytime the saw is running. Primer bulb for easy starts and inertia activated chain brake stops chain automatically to help prevent injury. Reduced kickback guide. SuperClean air filter system provides longer air filter life, reduced fuel consumption, and increased power. EPA approved. 1 year warranty. Perfect for light cutting jobs. Replacement chain, model No. S56 (SKU 705756); 2-pack chain, model No. S56T (SKU 751643); bar and chain combo, model No. 27857 (SKU 705977); replacement bar, model No. 16S56041 (SKU 721776).