Olympic weightlifting uses a steel bar with rotating sleeves (also known as a barbell) which hold rubber-coated discs of different weights. The weight plates, typically referred to as "bumper plates" because of their rubber design, weigh between 0.5 kg and 25 kg. A men's Olympic barbell weights 20kg (44lbs) whereas a women's Olympic barbell weights 15kg (33lbs).[7][8]