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 photo!This size of rivet is used for beta biothane straps with a width of 13-19 mm.The correct size of the rivet is always determined by the thickness of the material being joined, such as biothane, nylon strap, leather, or textile. Always add 2mm to the width of the material. Material: Stainless Steel (AISI 304)