The DEWALT DCMCS575 XR FlexVolt Chainsaw has an energy efficient brushless motor for longer run time, and delivers performance on a par with 50cc petrol machines. Being battery powered, the chainsaw requires less maintenance than a petrol chainsaw, and has an auto-oiling system keeping the chain lubricated. The DCMCS575 XR has a tooled chain tensioning system built to professional specifications, helping to ensure the chain remains reliably tensioned, during use. The FlexVolt chain speed has been optimised for improved torque, and the chain brake stops the chain in less than one second, if triggered. Specification: Bar Length: 50cm.Chain Speed: 13.5m/s.Chain Pitch: 3/8in.Weight: 5.5kg.