DeWalt DW293, 7.5 Amp, 1/2 Inch Impact Driver with Hog Ring Anvil
DeWalt wins the top spot with their corded 1/2-inch drive unit. This one puts out 345 foot-pounds of torque, making it the strongest corded electric impact driver on the market. It also produces 2,700 impacts per minute, giving it lots of power for removing even the toughest bolts. The 1/2-inch drive anvil has a hog ring for retaining sockets, just like an air impact wrench would. The dual trigger allows you to control forward and reverse movement from the trigger, rather than from a switch. All ball-bearing construction makes for long life. It will also run off of DC power for remote use on jobsites.