Rogue is pleased to stock a wide assortment of OSO Collars, made in the USA from aircraft-grade aluminum. OSO Barbell 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. It’s the OSO's unique look, though, that generates the most attention, with its distinctive industrial gear-style shape. Choose from the exclusive Rogue-branded OSO clips or other variations, including "Mighty Collars" and metal and polymer options. Each OSO Collars page includes quality photos, manufacturing specs, user reviews, and an easy to use order menu.