Hacuba Fitness Barbell Collars are designed to help improve the safety of your workout. These barbell collars are made to fit on all Olympic size bars. These barbell collars are designed to allow you to quickly clamp on to the barbell and off your workout bar. These barbell collars are extremely tough and durable. Two individual 2" Olympic weight collars are included in this set. You can use these Hacuba Fitness Barbell Collars to help make sure weight plates you use do not slip off during your workout. These barbell collars are a favorite for professional training and many other commercial gyms and high-end strength and conditioning facilities. They are more secure than most traditional barbell spring clips. They are also easier to remove than spring clips. These are effective, durable barbell collars. Sold in Pairs Fast Locking Action Fits 2" Olympic Weightlifting Bars + Many Specialty Bars Lightweight Easy On/ Easy Off. The Hacuba Fitness brand comes in several colors including black, blue, red, yellow, green, pink, and gray. Great for training, powerlifting, and weightlifting exercises.