The 1-5/64 X 15 4MT HS XL Drill from Field Tool Supply is a premium high-speed steel drill bit designed for precision drilling tasks. With a 4 Morse taper (MT) shank, this drill bit ensures a secure fit in various machines, making it versatile for different applications. Measuring 15 inches in length, it is particularly effective for deep hole drilling in metals and other materials. The high-speed steel construction provides excellent durability and heat resistance, allowing for efficient drilling without compromising performance. Ideal for both industrial and DIY projects.