The Bulldogs did not hold 1 olympic plate per side on the bar. The plates moved the collars out toward the sleeve. With each rep the collars moved further down the bar. I wouldn't recommend these collars for barbell curls let alone deadlifts or power cleans...they just don't keep the plates in place on the barbell's inner sleeve.It's too bad because they are nice looking collars and very light aluminum (with a steel cylinder) that supposedly locks against the sleeve. It is my guess that the cylinder because it is just a small rounded steel bar that engages against the sleeve just can't grip on a rounded sleeve and can only slide once bar and plates are in motion. The nylon handle will lock the cylinder in place with less than a full turn which raises doubt to how these clamps could possibly keep plates tight and in place on an olympic bar.