This black oxidized silver and deming drill bit is a high-quality tool suitable for cutting through mild steel, brass, aluminum, wood, and plastics materials. It has a 11/16 inch diameter and is made of high-speed steel with 135 degree slit point for accurate drilling durability and efficiency. The item length is 6 inches with 3" long flutes and it comes with a 1/2" shank with 3 flats making it perfect for drill applications. The package quantity is one piece, and the unit quantity is also one. This drill bit is manufactured in China.