English and SI units of measure Tools of 150 ft. Lb. Capacity and below use SR Interchangeable Heads (1 7/16 Common Centerline) Tools of 250 ft. Lb. Capacity and below are available in either the traditional dovetail with pin and spring system for interchangeable heads or the Quick Change system Uses four (4) AA rechargeable NiMH batteries, thousands of cycles between battery charges Batteries and Charger not included Includes a lightweight and rugged blow-molded storage/carrying case Includes FREE certificate of calibration unit of measure: Ft. From our ISO/IEC 17025 Accredited Calibration Laboratory. Sturtevant Richmont Exacta® 2 Digital Series Torque Wrench. Model: Exacta 2 – 400 Lever Lenght: 36.5″ / 927.1mm Overall Lenght: 35.9″ / 911.8mm Weight: 7.7 lbs. / 3.49 kg. Description: 400 ft. Lb, 543 Nm cap.