Description:1. Material: steel2. Applicable: suitable for 6/7/8/9/10 speed chain3. Color: bright silver plating4. Weight (Pair): 2.8g5. Size (packaging opp): 7x5x0.6cm6. Features: hydraulic punch, precise stamping, good workmanship, no burrs! Mature quenching and heat treatment process, reducing the quick release buckle deformation during vigorous burst, the force is direct! At the same time, the pull-out strength of the quick release buckle can be greatly improved up to 950kgF!7. Note: The magic buckle is a consumable item. Generally, one magic buckle can be used 5 times.

http://olla.gr/3-pairs-bicycle-chain-magic-buckle-chain-joint-model-km-9-speed/