The rotating rings have in metric threads have two, metric thread: M8-M64; English thread: 1 / 2-2 additional metric threads have longer section. If you want to know more rotating rings of size, please contact our Manager Zhang: 1`3`7`5`2`4`2`5`8`1`9 I mainly sell all kinds of lifting accessories? , lifting spreader, shackles, a variety of hooks, rings, screws, rotating rings imports, import tackle other lifting products, welcome to inquire and look forward to cooperating with you. Transaction process: After confirming good product and customers, we will sign a contract (the contract will be accompanied by product images). After the customer money, we arrange the shipment after shipment, we will notify the customer service staff note that check, logistics usually 5 days to pieces, within three days of delivery, dispatch can send SF, all for the "do not affect customers first." We will send a separate express ticket to avoid lost or damaged cargo. Some worry about the payment and delivery of new customers because no job security, our company now has opened a Taobao shop, you can choose to Taobao trading platform, intentions for every customer service.