Hilti - SIW 8-22 1/2" CORDLESS IMPACT WRENCH "This new impact wrench features two torque settings of 443 ft-lbs and 738 ft-lbs. Weighing in at 5.3 lbs for the bare tool." says
Hilti 12-Volt Lithium-Ion Brushless Cordless 1/4 in. Hex Chuck SID 2-A Impact Driver 2200201 - The Home Depot
Hilti Nuron Impact Driver - SID 6-22 - Tools In Action - Power Tool Reviews