About this item 8 inch pole saw power head attachment for models 2300402, 20672, and 20302 Easy adjust chain tensioning system for quick tightening of the chain Automatic oiler applies oil to bar and chain when needed to ensure durability and optimal use with a translucent oil tank for clear view of oil level Easy adjust chain tensioning system for quick tightening of the chain Genuine Greenworks replacement part REPLACEMENT ATTACHMENT ONLY. CONTROL HANDLE AND TOOL NOT INCLUDED