These alloy S-biners are more versatile than standard carabiners, because both ends have spring gates to accept ropes and other items. 

Features:
Made of 3CR stainless steel, its double-spring gates design has the same functionality and same nearly endless variety of uses. 
Ultra-handy dual spring gates will hold, secure, and connect everything from house keys and cell phone holsters to technical camping gear.
Attach valuables to the center bar for ultimate security, link gate ends to a second set of items and anchor, or connect many items together. 
Classic simple design, great for water bottles (to belt loops or backpacks), boots, skates, waders, sports gear, and garden gloves (to garage hooks and hanging straps), reusable grocery bags (to closet pegs and grab handles in your car).
 
Specification:
Material: 3CR stainless steel
Color: Black / Silver (Optional)
QTY: 5
Unit Weight: 31g / 1oz
Unit Size: 9 * 4cm / 3.5 * 1.6oz
Package Weight: 155g / 5.5oz
Package Size: 9 * 5 * 4cm / 3.5 * 2.0 * 1.6in

Package List:
5 * S-biner