This professional tool features adjustment of both pattern and pressure - similar to that of a hopper gun, making this product convenient and simple to use without the hassle of mixing or using a compressor. The heavy-bodied knockdown formula is tinted for improved visibility during application and the no prime feature saves time. Simply spray, "knock down" with a mud knife and paint to achieve an invisible, professional repair. The low odor, water-based pro formula is easy to apply and clean, while the ergonomic grip handle helps reduce fatigue in your hands.