Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
The amount of needles you get for the price is great. This is especially true because they break after the first or second time using them. The weld that holds the needle into the main threaded body comes apart and it completely useless. I'm not sure if there is a quality brand out there for inflation needles, but these are far from it.