I originally ordered two sizes of swivels the smaller ones were actually too small for what I required. I was disapointed to find two bearings that had come apart in the box. The larger swivels worked very well for the trolling application I had in mind. They seem to eliminate line twist from trolling big flasher rigs for salmon and the price is right. I did order more of the big ones but if there are swivels that are in two pieces I will send them back.