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OSO Mighty Collars

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OSO Mighty Collars

Designed and manufactured in Colorado using aircraft-grade aluminum, OSO Mighty Collars offer many of the same benefits of the standard OSO Barbell Collar in an economically priced model.

These super lightweight collars—available here in Gun metal—are sold in pairs and equipped with a rubberized interior lining to protect the bar. OSO Mighty Collars deliver a secure, stable hold through repeated, high-impact drops, and allow easy adjustments or removal with a simple lever and lock/unlock mechanism.


  • Made in the USA
  • Designed to be used on 50mm Olympic Bar Sleeves
  • 6061 Billet Aircraft Grade Aluminum
  • Black Rubberized interior lining to protect bar
  • Locking clamp mechanism for secure hold
  • Color: Gun Metal
  • Weight: 0.3 lb.
  • 2 Year Warranty*

Rogue fitness will warranty this product from defects in material, functionality and workmanship for a period of 2 years from the date of purchase of the product. The warranty applies only to the original purchaser of the product for so long as the original purchaser owns the product, and is non-transferable. Warranty may be voided for any product which has been damaged due to negligent or faulty use, alteration, maintenance, storage or handling by the user. Any specific issues regarding a Rogue product with which a customer is not satisfied will be reviewed on a case-by-case basis.Note: Rogue will continue to honor warranties on products purchased directly from OSO prior to Rogue's acquisition of OSO Barbell Collars on these same terms and conditions.

See Also: The exclusive Rogue OSO Barbell Collar

Gear Specs

Brand OSO
Made In USA Yes
Color Gun Metal
Product Weight 0.3 lb.
Width 1.4"
OSO Mighty Collars is rated 4.4 out of 5 by 79.
Rated 5 out of 5 by from Love them! I just got these and I love them. I have the OSO Pro collars (the ones that look like a gear with six cogs) which I also love, but I noticed that they were starting to chew up my bumpers. I bought these because I figured the lower profile design would be easier on the bumpers, and it is. The Pro collars are so sweet, but I kinda wish I had just gotten these in the first place. They seem to be just as secure as the OSO pro collars and cost over $20 less. The only reasons I can think of to get the Pro or Elite collars over these is for the added bling factor and the fact that they are heavy enough to make make your 20kg barbell basically an even 45lbs.
Date published: 2015-11-10
Rated 3 out of 5 by from Just ok, little disappointed. Look they are tight, really freaking tight. I spent about 20 mins wearing one of them down so the clip would move. I thought it was going to break. I was ready to throw them away. After reading and looking online I am not the only one. It literally creates a groove in the clip. I have not even used them yet. If you do not get the clip pulled all the way back then the collar will not go on the bar. The other thing is that it clips on by clamping the clip over the bar and makes an impression on the bar itself. Spend the extra money on a only style collar if you don't want the hassle or wear on the bar.
Date published: 2019-08-01
Rated 4 out of 5 by from Great clips for a great price! I bought these for Crossfit since we're constantly dropping/slamming the bar or doing lots of other dynamic movements and the standard bar clips have a tendency to slide off. The OSO clips have been great so far! I love the low profile design, they're very lightweight, sturdy construction, and once they're locked they won't budge. The only downside, and the reason i gave them a 4 star rating, is that they can be cumbersome to slide on. They only open up to be JUST larger than the bar and tend to get stuck as you put them on. If the workout only requires one weight then it's no big deal, but if you're using multiple weights or have to switch weights during the workout it can be very frustrating. Otherwise, great product!
Date published: 2018-12-31
Rated 3 out of 5 by from It’s a budget collar I feel bad giving this too harsh of a review because this collar is meant to be a budget item, but even still it fell short of expectations. Its diameter is just barely bigger than an Oly bar, so it’s a pain to get on and off, and often sticks/catches. The lever is also too tight and feels brittle at the same time. Go for the more expensive OSO collars, you'll be glad you did.
Date published: 2018-06-15
Rated 5 out of 5 by from Durable and Compact I searched different review sites for the best collars for the money. These seemed to be the best. They are lightweight and compact enough to fit in my workout shorts pockets while I am in the gym. I don't have to carry around a bag or store them in the floor lockers. The only downside is that they don't slide on the barbell as easily as I would like. It takes just the right angle to slide them down the bar. At first I thought I had bought the wrong size, but it's just the nature of the design. I think that the longer I have them, the rubber on the inside will start to get less sticky and it will be easier. All in all, I don't regret buying them one bit. Being able to walk around the gym with them in my pockets is the biggest plus!
Date published: 2019-07-05
Rated 5 out of 5 by from Surprisingly easy to remove and simple design. These collars are surprisingly easy to remove. From some of the other reviews, I thought they were going to be more difficult. By design these do not expand open like some other collars that can pop open during a workout. These collars have a solid round aluminum body with a rugged, rubberish inner liner. The lever on the far side of the collar simply cams against the barbell to lock the collar in place. I can even see how I could repair these collars if they were to lose their grip. Simplicity is typically longer lasting - buy these collars!
Date published: 2016-12-14
Rated 4 out of 5 by from Sturdy Collar They have a small profile although do a good job at keeping the plate secure on the sleeve. Used with both Rogue Olympic weightlifting bar and DHS training bar. They take a careful hand to remove due to the inner rubber lining. They do the job they are built for and have been in use for 1 week so far. 12/7/16 NOTE: these will not work on the Rogue axle bars. It will be necessary to purchase the OSO axle specific collars.
Date published: 2016-12-07
Rated 4 out of 5 by from Budget Collars First off, my experience with these so far have been good but take into account other reviews that mention the problems they have had with these because you very well could run into the same issues. These collars are paired with my Ohio Bar and fit like a glove, taking them on and off is a breeze. The lever on them feels sturdy but I can tell that they will EVENTUALLY (depending on amount of use) break because of the quality of materials not being anything too amazing or sturdy. I use them for 315 lb deadlifts and they keep the weights in place and only allow a little movement of the plates which I like. The inside of the collars have a nice thin rubber padding which keeps the barbell sleeves from being worn down as fast. These are definitely a great product for the price you are paying for them and will last you awhile..but not forever. These are definitely better than spring collars and velcro collars. Do be careful with dropping weights or anything heavy on these because that would likely cause these to break because of the materials.
Date published: 2020-03-01
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