83 in. Full Mortise Continuous Hinge CFM Heavy Duty in Duranodic Cordless Saw battery CoolPack Technology – keeps battery CoolPack Technology – keeps battery cooler for up to twice battery lifetime Single cell monitoring – maximizes the performance of each individual cell for longer runtime Electronic monitoring systems – protects both tool and battery for long tool life Integrated LED fuel gauge – displays battery's state of charge Cold weather operation – works in temperatures down to 4 ° F System compatibility – operates with all Bosch 18 V Lithium Ion tools and chargers as part of the Flexible Power System Gear drive ) 4 in Manufacturer Warranty 10 Year Warranty These continuous hinges are either full mortise (CFM and FM2 codes) or full surface mount and are non handed