The NV83A5M Round Head Coil Framing Nailer is used for construction work such as wall sheathing, roof decking, subflooring, mobile and modular home construction, making of wooden boxes, pallets and drums, packing operations in manufacturing plants, and for other types of general packing and crating work. The NV83A5 is like the original NV83A that you have come to trust, but now with an improved trigger design and sharing all the same internal parts as the original NV83A. The NV83A5M relies on the same cylinder valve drive system as the NV83A, which offers both rapid response and great driving power.