A spirograph for your puck. Three geared arms trace hypotrochoid paths through the grounds: clumps broken, density equalized, bed level. Four spins. Aluminum housing, scratch-resistant satin anodize Sealed ball bearings: spins with one finger, no maintenance Three gears: the Sweeper breaks clumps, the Scrambler equalizes density, the Edge Dancer works the rim 10 stainless pins with adjustable depth; 20 included, with 2 storage tubes 9 neodymium magnets grip the basket for one-hand operation (two hands on non-magnetic baskets) Available in 58mm and 54mm; choose your basket size above Gears in aluminum or plastic In the box: gear mechanism with pin-depth sleeve, storage stand, pins By ARO Espresso Puck prep matters more than temp. This is the step that makes the shot repeatable.