Description 1 100 Brand new and high quality2 Easy to install3 Pit Bike pre drilled chain tensioners adjusters for 15mm axles to change the hole size just drill out for 15mm or larger Specification Hole Inner Diameter 15mmFit axle size 15mmScrew Fixing size 45mm x 6mm LxD Color Red Blue Gold Silver BlackQuantity pairMaterial AlloyFitment Classic wheels various other styles used on Chinese Import Bikes with 15mm spindles axles Note Please allow 0 5 1 inch difference due to manual measurement 1 inch 2 54cm Package Included 2pcs x 15mm Chain Tensioner Adjuster