
Impressively heavy magnetic prep/tamping block for use with my Billet Baskets only. Weighs 4lbs with rubber footing to grip onto your counter.
Works with or without a portafilter (only for straight through portafilters without a lip at the bottom)
Video demo here
The base is a solid block of stainless steel which houses a very strong magnet. The magnet is turned on and off by rotating the upper Delrin/POM body which is sized for specific basket diameters.