1DURABLE MATERIAL: Made of alloy ceramic tungsten steel material, come with high finish and durability for a long life 2UNIVERSAL AND PRACTICAL: Suitable for steel watchband or ceramic watchband, high grade and ordinary watch accessories, used for most watchbands 3DOUBLE BUTTON FOLDING BUTTON: Possess unique expansion button for easy and convenient opening, fast and convenient 4PRODUCT SIZE: The size of this style is 5x15mm. Please measure A(buckle width) and B(head width) before purchase 5CORROSION RESISTANT: Folding deployment clasp possess corrosion resistance, good mechanical properties, high strength