Material: The Leather Sewing Positioning Pins are made of brass, ensuring long lasting durability and reliability. Versatile Use: The long pin measures 18mm, suitable for locking leather edges with a thickness of 6-12mm. The short pin measures 12mm, ideal for securing leather edges with a thickness of 0-6mm. Anti Slip Design: Each pin features a bottom that is knurled and anti slip to provide firm grip and prevent movement during use. Easy to Use: These pins are great for leather fixing, offering convenience in use and making your DIY projects easier. Product Specifications: Each pack contains 6 pins measuring either 28mm or 24mm in length and 9mm in width, providing you with enough tools to handle various tasks efficiently. Specification: Material: Brass Size Chart: Length: 2.8cm/1.10inch, 2.4cm/0.94inch Width: 0.9cm/0.35inch Package Includes: 6 Leather Sewing Positioning Pins Note: Please allow slightly errors 1-2cm differences due to manual measurement.