The Olympic Chrome dumbbell bars with collars are made from solid steel & have a chrome finish which means they are robust & durable. They are made for use with 2" (5cm) Olympic weight plates & feature knurled handles that give you better grip so you can lift with more confidence. The spring collars make sure plates are secured safely in place. The dumbell bars each weigh 7.5kg (16.5lbs) & come in a pair.