Fits 58mm Portafilter - Castle Coffee Needle Distributor fits 58mm portafilter perfectly. After a few spins, you will get evenly-distributed coffee powder. 
22 Needles Evenly Distribution - Scientific arrangement of 22 needles allows efficient and evenly distribution. Improve your extraction quality and reduce unpleasant taste in coffee liquid. 
Adjustable Needle Depth - The maximum needle depth is 19.5mm, which is enough to reach the bottom of most 18g filter basket, then achieve thoroughly distributing. 
Cleaning Brush Inside the Base - You can spin Castle coffee needle distribution tool on the base, then the brush will sweep off coffee residues on needles.