No-load speed 0~2600/min. Machine screw:4-8mm(Diameter) Standard bolt:4-12mm(Diameter) Maximum Torque:100N.M Full-load impact rate:0-3200bits/min. Battery:12V 2.0Ah Ni-CD Charger:45 minutes fast charger * Replaceable carbon brush for continuous life. * Professional motor and durable gears.