Closed rivets are used where both sides of the rivet are visible, or when the rivet comes into contact with another surface, such as bag handles, grips, leashes, collars, harnesses, etc.The listed price is for a pair as shown in the photograph!This rivet size is used not only for beta biothane straps.The correct rivet size is always determined by the thickness of the material being joined, such as biothane, nylon strap, leather, or fabric. Always add an extra 2mm to the thickness of the material.Material: SteelFinish: Brass Plated