What you have here is the 30 lb capacity ultra precise scale. This scale has many uses. HVAC techs use it to weigh their refrigerant. Jewelers use it to weigh their gold and precious stones. Teachers using them at school to show their students how to use scales.. you can use this to weigh your cans before you take him to the recycling center that way they don't do you dirty. You can use it to to weigh your weed after you go to the dispensary to make sure they're not jipping you. I'm sure you can find your own reasons to use this scale.