SE Racing chain tensioners are a must-have for any rider looking to keep their chain in optimal condition. Made from CNC machined 6061-T6 aluminum, these chain tensioners are not only durable but also lightweight. The single bolt operation allows for easy adjustment to take up chain slack, making tensioning a simple task. Compatible with 3/8 inch (10mm) axles, these tensioners are versatile and easy to install. Choose from a variety of colors to match your bike's style. Keep your chain in check with SE Racing chain tensioners.