The FLEXVOLT 60V MAX* Chainsaw features tool-free chain tensioning and a bar tightening knob to enable proper bar clamping force, and it features auto-oiling for continuous lubrication. Chainsaw is compatible with DeWalt 9.0AH at 20V and 3.0AH at 60V batteries. Kit Includes: Chainsaw, 60V MAX 3Ah Battery, Charger and Hard Bar Cover.