Hook for connecting Use it for key chains, etc. ●Made of lightweight and colorful aluminum alloy. Spring gate is made of SUS304. Size: 1.0 x 1.6 x 0.1 inches (25 x 40 x 3 mm); Capacity: 4.4 lbs (2 kg); Material: Body: Made of aluminum alloy, spring gate: SUS304; Body: Aluminum alloy, spring gate: SUS304; 1.0 x 1.6 x 0.1 inches (25 x 40 x 3 g).