Sometimes in order to make things better you need to take them back to their original design. With that being said here we have the all new and at the same time like the original NR83A5. The NR83A5(S)M has the same legendary durability and reliability you have come to trust with MetaboHPT, but now with an improved trigger design and sharing all the same motor parts as the original NR83A5. (or original tool from the late 80’s. 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. With the selective actuation now on the trigger we not only reduced the total number of parts in the trigger but also eliminated all composite parts.