LEGO's Brick Key Chains subtheme features a variety of key chains, each showcasing a 2x4 LEGO brick in different colors and finishes, permanently attached to a metal ring and chain. Notable releases include the Red Brick Key Chain (set 850154) from 2007, the Turquoise Brick Key Chain (set 853380) from 2012, and the 2x4 Green Metallic Keyring Key Chain (set 854083) from 2021. These key chains have been popular among collectors and fans, with some appreciating in value over time.
Summary
Gear Key Chains / Brick White Brick Key Chain set 852100 was released on October 24, 2007, retailing for $5, it has since been retired. New, unopened sets are valued at $7, while used sets sell around $6.
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