Acrylic Visible Window - This design can help you easily distinguish which is the pepper mill and which is salt mill,and can also know whether the wooden salt and pepper grinder set needs to be refilled or not. This grinder is suitable for various spices,such as pepper,sea salt,and himalayan salt,The grinder will produce fine Grinding to ensure unifoem distribution in your diet. Simple operation: Unscrew the stainless steel nut,open the circular wooden cover,use a spoon to take some salt and pepper and add them with a funnel,then put the wooden cover back in place,screw the nut back in place,rotate the wooden cover for grinding. Built to Last - A pepper crusher that withstands the test of time. Constructed with high-quality materials,this durable kitchen essential guarantees reliability and will serve you for years to come.