Chain Tensioner - New and high quality, made of iron and plastic material for long-lasting durability. Chain Adjust Tensioner - Easy to install with no damage to the frame; automatically adjusts chain tension without manual intervention. Chain Adjust Tool - Solid and durable design effectively prevents chain slippage or loosening. Motorcycle Chain Tensioner - Enhances riding safety with abrasion-resistant and durable construction, improving tire performance. Adjustable Chain Tensioner - Fits most motorcycles; designed for modified bikes and automatically adjusts large chain tension. Specifications: Color options: black, blue, red, yellow Size: roller size 6.5 x 4 cm Package includes: 1 pc motorcycle chain tensioner Notes: When installing the circular frame, use rubber or similar padding material to protect the mounting area. Screws may require extension; buyers should measure their vehicle dimensions before purchase to ensure compatibility.