supply of fastening brushless motor rail tightening machinefastening brushless motor rail tightening machine,battery operated 3/4 square drive 1600 nm fastening brushless motor rail tightening machi ne (cordless impact wrench ) with special extra long socket 41mm,32mm& 28mm with mobile connectivity feature with additional socket for plate screw renewal and insertion , capable of customization through sma rt phone like controlled speed/torque. make-bosch or similar firms offer same as above make/brand : inc-c o. brushless motor voltage: 20vsquare drive: 3/4no-load speed: 0-900/0- 1200/0-1800rpmimpact rate: 0- 1800/0-2000/0-2200bpmfastening torque: 1350nmnut-busting torque: 1900nmintegrated work lightinclud e:2 pcs 5.0ah battery pack(fbli20031)1 pcs 4a charger(fcli20411)3 pcs sockets(27 30 32mm)charge volt s:220-240v 50/60hz packed by plastic box [ warranty period: 36 months after the date of delivery ] ] => limited