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video for Shinano SI-1490BSR air impact wrench This is our best seller impact wrench. Lightest weight in its class. Twin hammer clutch and eight vanes motor generate an extreme torque.Specifications Maxium torque: 850Nm / 627ft-lb Breakaway torque:1,800Nm / 1327ft-lb Bolt Cap.:20mm / 3/4" Free Speed:(F)8,000r.p.m (R)8,500r.p.m Weight: 1.9kg/4.19lb Noise Level: 94/105 Vibration: 8.6/1.3 Avg. air consumption: 2.4l/s / 5.1CFM Air inlet size: 1/4"For more information, please se …