Taya39s patented design revolutionizes chain installation making the sigma con nector as strong as any other link in the chain taya39s sigma connectors are not only race proven but have been in use for over 19 years proving its reliability there are millions of sigma connectors in use everyday around the world sigma39s pin connector is de signed with a fl at top mushroom shaped head to interlock positively with the side plate its unique configuration provides unprecedented rive