The all new S75 Chain Tensioners, patterned after our original S2 design. These jewels were designed to fit 3/8"-10mm axles and have double holes for wheel and chain adjustment. They include a 18-8 stainless steel screw, completely integrated into the body and out of sight. We even added adjustment lines, so you can get your wheel back to the same location. Precision CNC machined from 7075-T6511 billet aluminum, including the slide. They are sold in pairs and will definitely enhance your ride.  They are available in assorted anodized colors, with the slides in raw finish. Color: Purple Anodized. Weight: 2.35 oz.