Material: The positioning shrapnel is made of manganese steel, which is strong, durable and not easily rusted and corroded. Design: The hollow single ball V-shape design of the positioning shrapnel improves positioning accuracy and the ball height of 9 mm effectively prevents the material from moving or deforming during the riveting process, improving the accuracy and stability of the riveted joint. Size: Diameter of 6 mm, a length of 37 mm and a thickness of 0.5 mm, and can be used for tubes up to 20 mm. Multipurpose: The positioning shrapnel is suitable for riveting a wide range of materials, including metal, plastic, wood, etc. Quantity: This product contains 20 positioning shrapnel, a sufficient number to meet your needs. Material.