Description:
Usage: Collars are easy and quick way to move your plates around, they also keep weight plates securely and safely while lifting.
Application: For all 1 inch standard weight lifting barbells or dumbbell bars. 
Easy to Use: Easy and quick to remove, safe and secure to provide balance and stability.
Durable: Made from robust and durable material for long lasting use.
Package: Included 2 pairs of dumbbell hex nut for you to use.

Specification:
Material: plastic
Color: black
Size(approx): 2.5cm/0.98inch

Package: 
2 pairs * Hex nut

CALIDAKA 4pcs Spinlock Collars Dumbbell Hex Nut Dumbbell Rod Nut 1 Inch Standard Barbell Screw Collar Nonslip Dumbbell Screw Clamps for Dumbell Weight Lifting Fitness Training - B16EBL80K