Been a great tool to keep a recent purchase of a digital scale in check as I found out that the scale I bought even tho it was calibrated at the place of purchase it was off by .3 by the time I got it home I guess because of transporting it also if the scales not used for awhile it seems to always need recalibrating so this was a definite must have.

When I search through these websites for calibration weight and I found "Old Will Knott Scales" website, I found their prices on calibration weights are very reasonable with very great quality! Thank you very much Old Will Knott.

I didn't expect a lot here...but am actually surprised by how the quality of this piece shines through. Who expects something other than a simple weight. Haha well I can say its bringing me back next time.

Even though the Jennings CJ600 scale says it comes calibrated I thought it would be a drag if I got it and it wasn't and I had to wait. Well my hunch was correct and the Scale was slightly off. I used the weight right away and it's been spot on since. Now I have it should I need it later.

I ordered this calibration weight along with an order for a new scale. When I received the order, I checked the scale, and it was off just a tiny bit, so calibrated it using the weight. Worked just fine, and the scale is perfectly calibrated.