Description:Made of titanium alloy, high hardness, solid and reliable, stable and not easy to rust.Titanium is beneficial to human body and quite safe.Resistant to corrosion, durable, hypoallergenic and non-magnetic.Easy to add and remove keys.Perfect choice for outdoor camping, hiking, mountaineering etc.Specifications:Color: purple, blue, graySize: 33mm, 26mm, 20mmMaterial: TitaniumWeight: 2/1.5/0.8gPackage included:1 X Key Ring