Hercules 20V Brushless Cordless 3/8 in. Compact 3-Speed Impact Wrench – Tool Only - Delivers up to 525 ft. lbs. breakaway torque and 229 ft. lbs. of fastening torque - Amazon.com
HERCULES 20V Brushless Cordless 1/2 in. Compact 3-Speed Impact Wrench (Battery Not Included) - Walmart.com
20V Brushless Cordless, 1/2 in. Compact, 4-Mode Impact Wrench with Friction Ring – Tool Only