To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Didn't know it only came with cm no inch. Shipped from China didn’t know that till I received it. Every country but the USA and three others use the English system most other countries use the metric system. Only reason I gave the low score.
These were pretty good quality and easy to use. They are easily read, and they serve their purpose. Are they much better than any other? Not sure, but they were worth my purchase and do what I need them to.