TAYA's patented design revolutionizes chain installation. Making the Sigma con- nector as strong as any other link in the chain. TAYA's 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. Sigma's 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 riveting strength.