NOHrD WaterGrinderThe NOHrD WaterGrinder brings this intensive sport to your home, enabling you to achieve the impressive fitness levels of a racing grinder, without having to forego the element of water! Key Features WaterGrinder Pure Intensity Upper Body Fitness Trainer In sailing, it is the task of the grinder to transform wind into propulsion by hoisting the sails as quickly as possible. Grinders perform the backbreaking work onboard, they are truly top athletes!