Description Upgrade your home gym accessories with these heavy duty barbell collars featuring a dual security butterfly wing screw design, ensuring the barbell collar screw clamps stay firmly in place during intense workouts. The robust steel construction provides anti-slip protection, making these weight lifting collars ideal for both professional gym accessories for men and home exercise routines. Features -Color:Silver -Material:Steel -Size:6.10X5.20X2.60cm/2.40X2.04X1.02in-Secure double insurance: the dumbbell retaining nut uses a double insurance design, effectively preventing barbell collar screw clamps from loosening during intensive fitness workout collars clips or weight lifting.-Quick release convenience: featuring a butterfly screw clamp collars for barbell, these metal barbell collars allow for fast installation and removal, for dynamic home gym accessories or professional routines.-Highstrength material: constructed from robust steel, these weight nuts provide heavy duty barbell collars performance, offering durability to withstand frequent use as weight collars for barbell.-Precise fit for bars: engineered with precision, the dumbbell screw nut matches various dumbbell barbell clamp collars sizes, ensuring reliable compatibility and reducing wear for lifting security collar use.-Universal gym application: suitable for both personal gym accessories for men and commercial gym clips barbell needs, these weight fasteners for bars adapt to multiple training environments and barbell clampsPackage list: 2 x dumbbell lock nuts