Good quality competitive price Chain ToolFor repair or replacement of bicycle chainsUse for 1/2" x 1/8" single speed 1/2" x 3/32" 5-7 speed chainsInstallation:REMOVE CHAIN1. Insert chain in tool2. Tighten or loose black knurled knob until width adjuster is tight against the side of chain3. Center the black tool pin on chain link pin- turn remover clockwise pushing chain pin almost out of side ...