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�NEW heavy-bodied Knockdown formula�is tinted for improved visibility during application and the no prime feature saves the Pro 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.