Strength Shop Olympic Screw Clamp Collars - Pair Easy screw collar with inner ring to protect your equipment Suitable for 50mm olympic sized sleeves but particularly good for smaller 48/49mm sleeves as they can be tightened up were regular collars wouldn't grip A great solution for bars such as dumbbells where sleeve space is limited Reduces the chance of injury by providing a nice tight fit to stop plates sliding around when performing barbell and dumbbell movements, Weight: 1.3007273458 pounds, Manufacturer: Strength Shop