20 Tooth One-Speed Freewheel.
•Cold forged from 4130 chromoly
•3 heavy-duty fast engaging/releasing pawls
•30 Points of engagement for an instant and reliable start every time
•Show chrome finish on the outside, titanium finish in the center
•8-spline body for weight savings and easier removal with standard 4-prong tool.
Designed for 3/32" chain, but it also works with the wider 1/8" chain.