1.58mm Adjustable Distributor - 58mm base designed to work with most portafilters and espresso machine models including Breville, Rancilio, Gaggia, La Pavoni, Hamilton Beach, ECM, La Marzocco, Rocket, Alex Duetto, Astoria, and all E61 group machines. Low profile design allows for easier tamping with a straight arm at 90 degrees to the counter. Evenly redistributes coffee grounds and provides a larger flat surface area for applying consistent tamping pressure using the palm of the hand, improving control and consistency. Height is adjustable via a screw mechanismno grub screws, shims, or Allen keys requiredto accommodate different doses or baskets. 304 Stainless Steel base offers durability and a solid feel during use. Anti-slip aluminum alloy handle provides a secure grip. Rust-resistant construction with premium materials and a refined appearance.