The LDWL1901 Electric/ Li-battery Powered Rail Bolt Wrench is portable type used for fastening and loosening the nuts from M30-M36, high working efficiency with light weight and replaceable battery. PODUCT SPECIFICATIONS Model LDWL1901 Dimension(mm) 850*330*150mm Rated voltage (DC.V) 24V Battery pack capacity (Ah) 24-48 Weight: 12.2kg