Make of Titaniums alloys, it have good strength, wear resistance, and is Can used for long terms. Ensure that the spring hinges is durability, easy to slide jump rings on the keychains, secure locking the mechanism and tightly closing the door gear. The durability structure can used as key holder and key storage device for daily. Effectively group and organize your key and keychains, small tool and gear. Small but reliable, the keychains have not additional weight, makings it easy to carry.