53.3 mm base designed to fit tapered Breville 54 mm portafilter baskets including the Barista Express, Pro, Touch, Bambino Plus, Infuser and Duo-Temp Pro. Palm Distributor delivers a consistent brew with three angled slopes that efficiently, evenly and consistently move the coffee in a circular motion to create an even puck, reducing variability between baristas. Height is easily adjustable with a screw mechanism (no grub screws, shims, or Allen keys required) to suit different doses or baskets; you can set the desired tamping depth for consistent tamping pressure every time. Ergonomic handle: an ergonomic smooth red rosewood handle provides a comfortable, sturdy grip and steady handling to help you create the perfect puck. Use scenarios: - Daily home espresso with Breville 54 mm baskets; adjust depth for different doses without tools and maintain puck consistency. - Training or multi-user environments; ensures consistent puck regardless of operator. - Works across Breville models; compatible with Barista Express, Pro, Touch, Bambino Plus, Infuser and Duo-Temp Pro for shared equipment.