Perfect for your strong lifts, powerlifting, weight lifting or any other Olympic bar workout, these quick release collars fasten to all 1" olympic barbells. They're easy to use one-handed with the spring powered snap-latch design to keep you safe as you add and remove weights from your barbell. Perfect for use with cast iron plate weights, cast iron grip plates and rubber grip plates, and a must for all standard home gyms and professional gym owners. Suitable for weightlifting exercises at home or at the gym. Fastens to all 1 inch Olympic Bars. Easy to use one-handed. Maximum user weight 100kg (15st 10lb). Size H6.5cm, W5cm, D3cm. Weight 0.15kg.