The Normcore Gravity Distributor Tool uses a self-calibrating, gravity-based 5-blade design to evenly level coffee grounds in the portafilter before tamping, reducing channeling for more consistent extraction. Because it settles by gravity, there's no height adjustment needed between different grind sizes or coffee doses. Its 58.5mm base is built from anodized aluminum and stainless steel and fits most 58mm portafilters, including E61, Flair 58, Rancilio, Gaggia, La Marzocco, and Rocket machines. A few simple turns is all it takes to produce a level, even puck.FEATURES Gravity Self-Calibration - Settles to the right level automatically, no adjustment needed. 5-Blade Design - Evenly distributes grounds to reduce channeling. 58.5mm Base - Fits most 58mm portafilters including E61 and Flair 58. Durable Build - Anodized aluminum and stainless steel construction.