The dewalt dc800m2 36v 4ah impact wrench is a powerful cooled wrench that delivers up to 440nm of torque while boasting 2500 impacts per minute for heavy duty fastening applications it features an all metal gearing system to efficiently distribute power and extend tool life the aluminium front housing means better weight and balance for the user and the modular component designs make for easy access and fast servicing there is a rocker switch for fast and easy forward and reverse selection