We recommend you check your system each season prior to irrigation. Fortunately, Agri-Inject has made that process even easier by offering a free Mister Mind’r “clean key” that features two different key sizes, allowing it to be used on the Classic Mister Mist’r®, Alpha Mister Mist’r®, Omni Mister Mist’r® and Ultra Mister Mist’r® injection valves. The key features 1/4″ and 5/16″ nutdrivers to tighten and loosen screw clamps, and a 3/8″ and 1/2″ locking clip release to help remove hoses from the Mister Mist’r or pump.