Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Perfect for attaching to backpacks, water bottles, porch swings, dog leashes and other connection applications Screw Lock and Hex Nuts Design-- Each chain quick link features a threaded end and barrel screw for easy attachment; The threaded latch provides a convenient and secure connection that is easy to attach and detach, making the linking more secure when connecting chain or attaching accessories to chains These quick links are the perfect extension for the chains to snap onto without all the hassle, such as side lifting, climbing ladder, rope fixing, truck tire chains, attaching safety chains to a trailer hitch and so on Suitable for Indoor and Outdoor Activities-The locking quick link carabiners are versatile accessories used in many applications, great fast link for pets, fitness equipment, fence gate, swing, hammock, pet , and DIY accessories, outdoor uses like camping, fishing, shade sails and carabiners. Material: Stainless steel colour: silver Package Contents: 30 x Carabiner(M6) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.