This is a scale released by KRUVE, known for their KRUVE SHIFTER, which sorts coffee grounds by particle size. It allows for a simple measurement of coffee ground particle size and green bean screen size. --Quoted from the official website: The BREWLER, specially designed for coffee lovers. This is a new, unused measuring tool that allows for quick reference of green bean and ground coffee sizes. Everything in the photos is included (no missing items). When taking it out for the photos, the hook on the white envelope-like outer packaging was slightly bent (see photo 5), so those seeking like-new condition should avoid this. ▪️How to use: 1. Take a small amount of ground coffee and place it on a flat surface. 2. Use the BREWLER to match the grounds to the hole sizes. 3. Because there may be particles of various sizes, line up both the smallest and largest grounds and note their sizes. These two numbers indicate the range of your grind in microns. ■Ground coffee size measurement: 200-1600 μm (in 100-micron increments) ■Green bean size measurement: 11-20/64" (screen size) ■Body: 16cm long Comandante Coffee Espresso