The DeWalt DC810 is a Heavy-Duty 28-Volt 1/2-Inch Cordless Impact Wrench With NANO™ Technology. The DC810s's heavy-duty impact mechanism delivers superior torque for heavy-duty applications. Its heavy-duty all-metal anvil provides durability and prevents shearing. A high speed all-metal transmission on the DeWalt DC810 delivers 2,400 rpm for increased productivity. A high power, high efficiency motor delivers maximum performance in all fastening applications. DeWalt's exclusive NANO™-phosphate lithium ion cells offer long battery life and durability: 2,000 recharges. The DC810's variable speed reversible switch provides full-range control for both setting and removing fasteners. An electric brake allows for precise setting of fasteners and an anti-slip comfort grip provides increased comfort and control.