This home portable hand coffee grinder uses an all-steel SUS420 steel 5-angle grinding core, no longer a traditional ceramic grinding core, with a higher hardness of 48-55HRC, high wear resistance, high rust resistance, and more durable. The grinding disc of this coffee machine is detachable, which is more convenient to clean the grinding disc and grinding core. It is more convenient to purchase the cutter disc separately after long-term use. The product is smaller and easier to use. This coffee machine has 12 adjustable grind levels. Corresponding appliance grinding thickness adjustment: portable Italian 6-10 grids, espresso machine 8-10 grids, moka pot 10-12 grids, hand pouring pot 20-24 grids, ice drip pot 20- 24 grids, siphon pot 20-24 grids, French press pots 25-30 grids, Vietnamese pots 25-30 grids. The numbers displayed on the grinder of this coffee machine are easy to remember. For example, if you adjust the thickness to a suitable thickness, after dismantling and cleaning, when reinstalling, you can directly adjust it to the corresponding position according to the number, without retrying, which is very convenient. This coffee bean grinder adopts a sturdy and reasonable double-bearing fixed structure. Two precision bearings are fixed on the same part, which are closely matched with the solid stainless steel central shaft to ensure the overall concentricity, more uniform grinding and better powder quality. Specifications: Material: Stainless Steel Color: Black / Grey Optional Gear: 12 Pentagon Grinding Core Size: 36mm Pentagonal Grinding Core Hardness: 50HRC Package Size: 20 * 12.8 * 7.5cm / 7.87 * 5 * 2.95in Package Weight: 660g / 1.45lb Note: Please read the product manual carefully before use. Package list: 1 * Grinder