GOOD COMPATIBILITY6, 7, 8 speed missing link is compatible to all 7.1 mm wide 6, 7, 8 speed chain of bike; 9 Speed missing link fits for all 6.6 mm wide 9 speed chain of bike; 10 Speed missing link fits for all 5.9 mm wide 10 speed chain of bike. We has 5 speed types for you to choose, which are 6/7/8, 9, 10 ,11,12speeds, it is necessary accessory for bicycles.SMOOTH SURFACE & SUPERIOR QUALITYThis bike chain was made of steel material with fine treatment and accuracy machining,not only strong and durable but also prevent rust. Moreoverthis chain link is polished and smooth surface polished, smooth edges will not damage the bike chain, and is conducive to the smooth rotation of the chain.Suitable for Temporary Clean or Repairing Bike ChainsIf your bike's chain broken on the way, just use the Bike Speed Chain Link to replace the broken ones. This bike quick release buckle not only securely holds the chain together but also makes it much easier to remove and install the chain, especially during maintenance, cleaning, or replacement.About Bike Speed Chain Link Material: SteelColor: SilverTensile strength: 950 kgfOptions: for 6/7/8 speed9 speed 10speed11speed12speedQuantity: 5 pairs .Well packed in a box, convenient to carry and avoid losing. If you have any problem ,please contact us.Easy to installThis bike chain joint uses a quick release design, allowing you to easily disassemble and install without tools. Just grab the chain either side of the link with a cloth to avoid slipping, give a sharp tug in opposite directions and the link snaps nicely into place.