Smart assembly – Replacing a bike chain and no need to remove it from cassette.
SIGMA PRO, a synonym of strong combination, makes the chain assembly safe and tool-free.
HOW IT WORKS
A. Sigma Pro link
B. Sigma Pro top plate
Push and hold Sigma Pro top plate, pass open Sigma Pro link through the end of the chain
Place the top plate over the free rivet groove while bending the link
Press down Sigma top plate until
you hear a “click”, the chain is
Check all of the chain to ensure no stiff links
Open a chain by bending it hardly with the top plate of Sigma Pro toward yourselves until the top plate jumps out.
Noted: SIGMA PRO only for One-time use.