The barbell collar is made of high quality aluminium alloy material with high strength, durability, is not easily damaged to ensure your safe exercise. 【High Quality Aluminium Alloy Material】Manufactured from high quality aluminium alloy, these barbell clamps are durable and lightweight.It has a high level of strength, is strong and durable, locks firmly in place and can be used for a long period of time. 【Quick Installation】50mm quick release barbell clamps, easy to use one click lock design, For quick and easy installation/removal, can be installed in seconds with a single finger. For maximum grip and safety, the power-operated snap-lock jaw is designed to lock onto any type of barbell. 【Multi Purpose Portable Workout]】The barbell clamps are designed to accommodate a variety of different types of training,Perfect for cross-fitness workouts, olympic presses, deadlifts, benchpresses.The weight bar clamps are lightweight and space efficient so you can easily stow them in your suitcase or carry-on luggage, suitable for training at home, gym, park, etc.【Product Function】Barbell collar fits 50mm olympic bar, quick install/release between plate changes. No matter how long you use them, our weight collars have a rubberised lining to grip and protect the bar. 【Multiple color options 】 Black, Silver,Red, Gold, Blue 【Package includes】2 x Safe Lock collar clip