Milwaukee 2757-20 Impact Driver Manual. View the Milwaukee 2757-20 Impact Driver manual. Milwaukee M18 FUEL 14 inch Hex Impact Driver. manual. This hex impact driver has a powerstate brushless motor capable of 1,800 inch lbs of fastening torque. It has the following features REDLINK PLUS to prevent damage due to overloading or overheating, REDLITHIUM C5.0 Batteries, and ONEKEY technology. To learn more about these features, check out the operators manual for this impact driver. You are viewing the manual and parts listings for the Milwaukee 2757-20 Impact Driver .