Straight from KMC's website, because they say it better than any punch copy really could:

【Competitor Preference｜Unlimited Hardcore】

【Conquering the Pack with Super Lightweight｜Ultra Durability】

【Unique Half Link Design｜Adaptable to All Frame Geometry】

【Kool Knight Chain｜Chain for BMX Extremes】

- Length: 112 Links.
- Size: 1/2" x 1/8".
- Compatibility all wide single speed drivetrains.
- Color: Silver & Black.