I received the scale and it would not weight correctly so I ordered the 100 gr class 4 weight to calibrate and now it is just the perfect scale to take with me to coin shows. I was using a scale that only weighed pennies to 3.1 and now I can see if it is 3.11 or 2.5 in the 1982 year since they decided to change the coin in mid year. It can also identify a fake coin very easily if the weight is off.