TAYA's patented design revolutionizes chain installation. Making the Sigma connector 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 flat top, mushroom-shaped head to interlock positively with the side plate. Its unique configuration provides unprecedented riveting strength.