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The OSO Pro Collar was the product that started the revolution from typical spring and unlock jaw collars. Dreamed, conceived, engineered, prototyped, tested, and overbuilt in Colorado, USA; the OSO Pro Collar was the first advancement in plate retention technology since caveman invented the wheel. The collar works by flexing the aluminum body around the bar and using a patent pending locking mechanism to keep the pressure on the bar. Unfortunately, there will be no rest time during your WOD due to excessive re-clamping of plates on your bar.


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  • Sold in Pairs
  • Made in the USA
  • .86 Pounds
  • Designed to be used on 50mm Olympic Bars (may not fit cheap imported bars)
  • 6061 Billet Aircraft Grade Aluminum
  • Rubberized interior lining to protect bar
  • Positive locking mechanism for secure hold
  • 100% Paleo and gluten free

Additional information

Weight1.0 lbs

Blue, Green, Red, Gold, Gray, Orange, Pink, Purple


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    Aluminum Collars


    Just because OSO has the BEST collars on the market doesn't mean we can't make them even better! The Titan is the ultimate in plate retention technology. The entire body acts as a spring to keep equal and constant pressure on a variety of bar sizes. Even that cheap bar you bought imported from China can be used once again and your plates will stay put. There are interchangeable rubber plugs that allow you to use the same clamp body for both standard bars and strongman axle bars (Axle plugs coming soon!). You can customize your Titan with LASER engraving or different color plugs. Why upgrade to the Titan? Because you deserve the best, and second place is the first loser.

    Please note that the Aluminum Titan comes standard with Black plugs. During the purchase of collars you may add additional Titan Plugs at ½ price. Sold in packs of 4.

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