Features: Crafted from premium 304 stainless steel, these bicycles chain hooks deliver outstanding durability and rust resistant performances, ensuring reliability for outdoor cycling enthusiasts. The ergonomic design enables tool release chain installation and repair, featuring precise engineered grooves that securely grip chain during maintenance or emergencies roadside fixes. Ideal for mountain bikers, road cyclists, and commuting riders who prioritize compact repair tools for unexpected chain disconnections during adventures or daily rides. Perfect for repairs, garage workshops, or city commutes, these light weight hooks (0.8oz each) easily store in saddle bags or toolkits for quick chain reconnection on any terrain. Engineered with lock and generic 6/7/8 speed chain compatibility, this essential cycling accessory maintains secure drivetrain across bumpy and high speed road conditions. Specifications: Component: 304 stainless steel Size: 77x16mm for standard bicycles chains Practicality: Suitable for chain repair and maintenance of mountain bikes and road bikes, it is easy to carry, and is a must-have repair tool for cycling enthusiasts. Package Includes: Bicycles chain hook × 3 bicycles chain hook × 6 bicycles chain hook × 12 note: Please allow 1-2cm errors due to manual measurement.  Please allow for slight color differences due to different display resolution