Made in Japan by YKK (made in Japan) with one-touch locking function (silicone) that does not rust even when salt (it is not metal spring); Size: Maximum width 1.7 x length 3.0 inches (4.3 x 7.5 cm); Weight: 0.4 oz (11 g); All plastic (Does not fadeles); Tensile strength (vertical directional): 200 kg); Material: POM resin (As a wide variety of engineering plastic; It is widely used in various machinery, building materials and functional goods, etc. Features: Successfully molded body and gusset.Perfect as a rust free accessory carabiner with no metal parts.