Olympic Spring Collars - Pair
Product Review (submitted on December 27, 2013):
These were a bit tight at first but after a week of use they have softened enough to give a tight grip but not be too difficult to get on and off.
These are great for the classic lifts where you want the plates secure. However, I wouldn't use these for the olympic lifts if you plan on dropping the weights. For maximum barbell and plate life it's better to go for the lockjaw style collars for that.