The Polytops Pins are 14 gauge stainless steel box nails measuring 40mm in head diameter. With a pack of approximately 250 nails, these metric nails are perfect for various crafting and DIY projects. The high-quality material ensures durability and strength, making them a reliable choice for fastening tasks. Ideal for professionals and hobbyists alike, these Polytops Pins provide a versatile and efficient solution for your projects.