High Performance G-MAX 40V Lithium-Ion Battery delivers fade-free power with no memory loss after charging * Robust 12-inch steel chain and bar with tool-less chain tensioning offers ease of use while delivering the highest cutting performance * 3/8-inch chain pitch delivers the right amount of capabilities to get those limbs trimmed and cut with minimal kickback * 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 * Compatible Only with G-MAX 40V Battery Models 29462 and 29472