There's nothing better than buying an original, and that's what you get when you go with Miller Y-Link swivels. It was Mr. Cecil Miller who invented and patented the first ever angular contact ball bearing swivel. The multiple angular contact bearing design extends the life of wire rope and maximizes efficiency, reliability and service life. They also have the lowest starting torque for faster response and higher rotational speeds. Y-Link swivels utilize structural components machined from forged alloy steel--not cheaper cast parts. They are zinc-plated inside and out for effective protection against corrosion. Each swivel is individually proof-tested at 2 times the Working Load Limit, certificates are available. Safety factor of 5:1 (sizes 35T and under). Additional sizes and different configurations available upon request.