51/58mm Size-The adjustable palm distributor & tamper is designed to work with the 51/53/58mm portafilter Consistent Espresso- Get consistent distribution and pressure every time making it easy to pull your perfect shot right at home, Leveling your grounds before tamping creates a uniform and consistent tamp. Adjustable Depth - Set your desired tamping depth for consistent tamping pressure every time. Dual Head- Distributor/Leveler and tamper are designed in one, double sides are available. Pro Tips-Ensure your portafilter basket is fully dosed with coffee grinds to get the right amount of pressure from the tamper for a tighter pack and richer flavor. For best results, groom the top of the basket with a finger or flat edge before leveling and tamping. Brew with good, filtered water