Quick-release clamps for discs 51 mm When training with short or long dumbbells, discs need to be changed quickly. To make this change easier and safer, we offer you these Olympics quick-release disc clamps. Their ultra-strong, one-handed lever lets you slide your weights on and off with ease. The rubber coating on the inside protects your bar from scratches and lets you lift your weights without worry. Product features:Set of 2 disc blocks. Suitable for all barbells with a diameter of 50 mm . Quick and easy disc attachment. No risk of slipping, even with high loads. Modern design. Wide choice of colors: black, red, blue or silver. Easy handling and convenient one-handed assembly. Robust materials: Long-lasting aluminum. Dimensions Inner diameter: 50 / 51 mm. Outside diameter: 8.5 cm. Width: 4 cm. Weight of one disk-block: 180 g. .