Our 2” Aluminum Barbell Collars are a must have piece of home gym fitness equipment for any strength training routine you do with a 2” barbell. We have multiple colors to choose from - Black, Blue, and Red. Versus plastic barbell collars, Aluminum offers more durability and higher tension strength which lends to better protection at higher weights. Our collars include a nylon lock-open lever allowing the user to completely open the collar for simpler installation and removal from bar. We recommend using these beauties on any of our standard Olympic style 2” diameter barbells - straight bars or curl bars.