The Metabo HPT siding nailer is capable of driving nails as large as 2-1/2" x .099" at a rate of 3 per second, the NV65AH2 is both powerful and efficient. With added features like a selective actuation switch, side-load tilt bottom magazine and repositioned depth of drive adjustment dial, this professional siding nailer gets even better. Additional features such as the adjustable air deflector, no-mar nose cap and plastic shield add convenience, and the ability to use both wire or plastic sheet nails creates flexibility. The NV65AH2M takes both 15 and 16-degree nails depending on the collation. Each has a different degree. 15-degree Plastic Collated Nails or 16-degree Wire Collated Nails.