Built for 58mm baskets, the Blind Shaker® redistribution tool is perfectly engineered to help baristas reduce static, decrease channeling, and increase extraction yield on every shot. The polished-smooth interior is finished with a proprietary process to resist grounds sticking, to ensure minimal brushing is needed to get all grounds where they're going. Additionally, the Blind Shaker has a magnet installed in the base of the stem for self-centering on EG-1 and Key platens, as well as on the right rear shelf of the EG-1 base. Please note, if intended use is with non-Weber Workshops grinders that do not adhere to north up standard for magnet orientation, check the Compatibility section on this page before purchasing.