21V Lithium Brushless Impact Driver, Keywin
Voltage:21V (with one 4.0A battery pack and charger) Max speed: 0-1350/2000/2800rpm
Max impact rates：0-1700/2500/3500ipm
Max torque:230 N.m
Gear ratio:10.5:1
Brushless Motor （No need for motor carbon brush maintenance )
