Barbells, Dumbbells and Kettlebells: A Guide to Free Weights
But there are many types of free weights to choose from, making choosing the right one potentially tricky for new users. Which weights should you be choosing? Here we look at the main types.
https://www.pinnaclefitness.org.uk/blog/used-fitness-equipment/barbells-dumbbells-and-kettlebells-a-guide-to-free-weights.html