To get an optimum milk quality, shaving the cow's tails is imperative. By shaving the tail, you avoid any contamination of the udder by the urine or the cowpat. Taiwell 2 must be installed on a drill that have a least a power of 14V and a 1000 rpm speed. Drill not included. The use only take 4 seconds per tail. Can even be used on very dirty tails. Harmless for the animal and the user. From the famous New-Zaeland manufacturer, Shoof.