This is an elegant and solid double-ended measuring scoop. This steel scoop has one end that measures a single dose (7 grams) of ground espresso for single shots, and the other end that measures a double dose of espresso (14 grams) for double shots. You should keep in with your espresso machine, especially if you use preground espresso. The way to keep your extractions consistent is by keeping the volumes uniform, and the extraction times constant. This scoop will help you to do this. Keep it with your espresso machine.