1. [54mm Breville Dosing Funnel]This espresso accessories designed for use with 54mm mobile filters. Is a barista tools for Breville Barista Express, Barista Touch, Barista Pro, Infuser, Duo Temp pro. 2. [Hands Free and Auto grind]With just a slight twist, this 54mm dosing funnel attaches to your 54mm coffee Breville portafilter, the ears on either side help the filter fit securely under the grinder, Thus ing hands. The espresso machine accessories has a button that slides into the chute, then the button tap auto-activates the grinder for a perfect dose. 3. [Prevent Overflow]The height increases after wdt tool installation, so that the portafilter can easily hold 21 grams of coffee powder, avoid spilling, it can save coffee powder and keep the environment clean. 4. [Tamp The Coffee Powder]This espresso dosing funnel works with the tamper to easily help you compact the ground coffee in the mobile filter, significantly reduces the mess and difficulty in loading and tamping.