RooLox Barbell CollarRoolox are an innovative approach to historically unchanged barbell collars. The entire design was centered around ease of use. Roolox simply slide onto the ends of any Olympic barbell and fasten your weights tightly to the bar by a simple click. When the outer sleeve of the Roolox is pulled backwards to expose the green line the collar is then locked in place. To unlock the collar, you simply push the outer sleeve towards the loaded weights on the