Usage Methods: This Bike Chain connectors can reuse 5 times(After disassembling 5 times repeatedly, it is necessary to replace the bicycle chain with a new one to ensure a good experience).The chain matched link hooks easy to assemble and disassemble chain,Suitable for mountain bike and road bike.Compatible Model: When your mountain bike have missing link,you could self replace chain,because 8 speed chain of bike width is 7.1 mm(Standard Size), so this missing link chain is compatible to most 8 speed chain.Package Quantity: 6 pairs of stainless steel chain link, totally 12 pieces, with 1piece chain hooks Well packed in a bag, convenient to carry and avoid losing.This set could equip your bike chain repair kit.Quality Material: The 8 speed chain for missing link is made of highly quality carbon steel material, and matched stainless steel material chain hook, Not easy to rust and suitable for a long-term use.8 Speed Chain Size: Each missing chain link size is 20 x 7.1 x 8 mm; The bike chain link is 20 mm in length, 7.1 mm in width and 8 mm in height; The missing link model: 8 speed chain.