In 2006, LEGO expanded its Exo-Force theme by introducing key chains featuring prominent characters. The Takeshi Key Chain (item number 851729) includes a non-detachable Takeshi minifigure affixed to a metal ring and chain. Similarly, the Hikaru Key Chain (item number 851818) presents a Hikaru minifigure attached in the same manner. Both key chains were initially priced at $3.49 upon release.
2 items

4299934 Exo-Force Takeshi Key Chain

Theme / Subtheme Gear / Key Chains / Exo-Force
Year 2006
Availability Retired
4299934 LEGO Exo-Force Takeshi Key Chain
Retail $3.49
Value $6.32
Growth  +81.1%
Annual growth 2.5%

4493747 Exo-Force Hikaru Key Chain

Theme / Subtheme Gear / Key Chains / Exo-Force
Year 2006
Availability Retired
4493747 LEGO Exo-Force Hikaru Key Chain
Retail $3.49
Value $7.23
Growth  +107.2%
Annual growth 4.5%