Hilti 22-Volt NURON SIW 8 Lithium-Ion 1/2 in. Cordless Brushless Impact Wrench (Tool-Only) 2251631 - The Home Depot
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