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.
Beware.... Donot buy this product! It has steel wire but the connector are very poorly attached. Mine got broke at first usage itself. Wasted Rs270.. Its better to buy from local shop.. At least they are strong. When u need strength, looks are immaterial..