Chainring key Shimano TL-FC21

With the Shimano TL-FC21 chainring wrench chainrings can be easily and quickly disassembled and reassembled.

• 3-pin side holds the chainring nut when mounting / dismounting the chainring.
• 2-pin side for mounting and dismounting chainring caps
• Can also be used as 9mm and 10mm open-end wrench