Fino's Deluxe Espresso Tamper compresses ground espresso coffee into a puck that's level and dense for a richer, more flavorful espresso brew. Grounds that are too loosely packed allow water to pass through too quickly without extracting any flavor from the coffee. It compresses ground espresso into a densely compacted, evenly dispersed puck. The pressurized water then flows more slowly for the richest, most robust extraction possible. It also creates a necessary gap between the top of the grounds and the water disbursement screen so the dampened grounds don't swell to clog the water flow for a silty mess. It fits 58-millimeter portafilter baskets and the 11.