The NR83A5(S)M has the same legendary durability and reliability you have come to trust with Metabo HPT, but now with an improved trigger design and sharing all the same components as the original NR83A5(S)M . With the power to drive 2 In. – 3-1/4 In. nails into even the toughest materials there is no job this tool can’t handle. Experience quick response and rapid, powerful driving with the Metabo HPT cylinder valve drive system.