58mm Size & Premium Aluminum Alloy Material: Designed to fit standard 58mm portafilters and filter baskets, seamlessly integrating into your espresso setup. Crafted from high-quality aluminum alloy—durable, lightweight, corrosion-resistant, and easy to clean, built for daily barista use. 10 Needle Design (9 Fine + 1 Thick): Features 9 thin needles to evenly break up coffee ground clumps, ensuring uniform distribution and preventing channeling during extraction. The central thick needle acts as a stabilizer, keeping the tool steady when placed flat on a table. Magnetic Induction Auto On/Off Switch: Smart magnetic induction design—simply place the tool on a portafilter or filter basket, and the needles will automatically insert into the basket (adapting to its height) and start rotating. Lift the tool by the handle to stop rotation instantly, no manual buttons needed. 3 x 3A Batteries Powered: Equipped with 3 built-in 3A batteries (included) to provide stable power for smooth, consistent rotation. Easy to replace when needed, ensuring long-lasting use for daily brewing sessions. Adaptive Height & Effortless Operation: The needles adapt to the height of your filter basket automatically, no manual adjustment required. The hands-free auto rotation saves time and effort, making it ideal for busy cafes or home baristas who value efficiency. Proper Placement Reminder: For safe storage, place the tool flat or horizontally when not in use—do not stand it vertically on concave surfaces to avoid damage to the needles or internal mechanism. Barista-Grade Uniform Distribution: Eliminates uneven ground distribution and clumps, optimizing water flow during espresso extraction. Helps create a dense, uniform coffee puck, unlocking rich, balanced flavor and a velvety crema.