Battery revolution: the new Dewalt XR Flexvolt range of machines offers power for the toughest applications - without cables. Innovative brushless motor technology - higher power, more compact size and longer life. 40cm Oregon bar and chain (3/8 inch / 1.1mm) - cutting capacity comparable to petrol powered chainsaws. Chain brake - stops the chain immediately when the throttle switch is released. Automatic chain lubrication - reduces maintenance. Tool-less chain tensioning - easy chain/bar change and quick retensioning without long pause times. Tool-less oil tank cap and semi-transparent oil tank- for easy and quick checking of the oil level. Rubberized handle and ergonomic design for fatigue-free working. Basic type (without batteries and charger) optimally suitable for existing 54.0 volt XR Flexvolt battery.