This set includes 50 stylish 9mm black gunmetal color bullet cone spike studs with screw back design, perfect for DIY leather projects and embellishments. Each spike features a smooth, flawless finish with no casting lines, ensuring a polished look. The screw-back mechanism allows for easy application without the need for special tools or metal-dies. Crafted with durable plating and color, these studs are designed to resist fading and tarnishing, maintaining their appearance over time. Historically, studs and spikes have been used by samurais, Celts, and Romans, and today they are a popular fashion trend found on jackets, tops, pants, shoes, leather goods, and bags. The set comes with a convenient zip storage bag for organization. Please note that slight color variations may occur due to lighting and monitor settings. A 60-day warranty is included, with options for refund or replacement if needed.