Features: Suitable for 6-12 speed chain, ensuring a secure connection for most bicycles models. Combination cable bike lock provide a security solution for your bicycles. Light weight chain adjuster adds minimal weight to your bike, enhancing mobility. Effortless Installation: quickly link design allows for a easily setups, saving time and energy. Make from Metal for long terms performances and reliability. Specifications: Component: Metal Type: 6,7,8 speed/9 speed/10 speed/11 speed/12 speed/Tool 6/7/8 speed size: about 2.1x0.8x0.66cm/0.83x0.32x0.26inch 9 speed size: about 2.1x0.8x0.65cm/0.83x0.32x0.256inch 10 speed size: about 2.1x0.8x0.61cm/0.83x0.32x0.24inch 11 speed size: about 2.1x0.8x0.59cm/0.83x0.32x0.232inch 12 speed size: about 2.1x0.8x0.58cm/0.83x0.32x0.228inch Package Includes: 1pair Bicycles Chain Connector/1pc Tool note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.