Plates are disc weights that are slid onto the outer portions of equipment such as barbells and dumbbells to increase their overall weight. These plates are then secured to the equipment using collars to ensure that they do not slide off the apparatus.
Collars are used to secure weights onto equipment such as barbells and dumbells. Using collars ensures that the plates do not fall off and also help in reducing unnecessary jiggling during the exercise.
They come in a variety of designs and mechanisms. Some of the more popular types are the Spinlock, Spring and Lock-jaw collars.
