Made of stainless steel material, which is aluminum material. Stainless steel 't rust or corrode like aluminum does over time. Dishwasher is applicable. The handle design makes it much easier to stir the contents of large containers. It is a great tool that can be used in restaurants or . Fits for other foods products like jam, butter etc. new and high quality, Fits for different size jars. It's great for mixing peanut butter and jam in one jar! Also works well with any nut butter such as peanut butter.