Features: Make of Coppers materials, corrosions resistance, rusts resistance, impacts resistance and is not easy to break or bend. Equipped with grinding stone and rubber Rings that can firmly attach to the Darts to prevent unnecessary shaking or loosening during use and ensures practicality. 2BA Thread, the perfect Choice to ensures balance when throwing, ensures a precise trajectory and improve your throwing accuracy. You can attach the new darts Tip to your darts by simply turning them to ensures a secure hold. Great gift for darts enthusiasts and perfect for home entertainment projects. Specifications: Materials: Coppers Color: Coppers Head Black Needle/Silver Head Black Needle/Silver Head Silver color Needle Thread: about 4.5mm/0.18inch Package Includes: 15pcs Coppers Darts Tip 30pcs Rubber Rings 2pcs Grinding Stone note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.