This Makita impact wrench uses chucks with a keyless system. You don't need to bother with a cord, since it runs on a rechargeable battery.
From Alan Wadkins
Makita DHP458RTJ 18V Combi Drill With 2 x 5.0amp Batteries + Charger +
Powertool World
Makita DHP458RTJ 18v LXT Combi Drill with 2x 5.0Ah Batts in Makpac Case