Introducing the Action Chain Tensioner in Silver for all your BMX and MTB needs. This high-quality part ensures your chain stays tight and secure while cycling, allowing for a smoother ride. It is compatible with various bike types including BMX Bike, BMX Bike - Racing, BMX Bike - Old School, and MTB.Fits 3/8” axle.Crafted from durable aluminum and manufactured in Taiwan, this set includes two chain tensioners. The Action Chain Tensioner is an essential part for any cycling enthusiast looking to enhance their bike's performance. Get yours now and experience a better ride!New old stock. I recently bought all the old stock from an old local bicycle shop. So follow me for more great nos finds for you road, bmx or mtb.Please closely review all pics to self assess contents/conditionPlease msg me with questions