The 51mm coffee tamper is made of 304 stainless steel base, no rust, no corrosion, stain resistant, the surface is smooth and easy to clean. The tamper has an ergonomic handle with a comfortable grip that allows you to push ground coffee easily. The smooth, flat 51mm base distributes force evenly, making tamping easier of coffee, perfect for professional espresso coffee machines. 30 pounds of force, ensures sufficient and even pressure distribution. Ideal for tamping coffee powder. coffee freshness before brewing, an extremely nice gift for any coffee lover.