This Irwin 1837479 drill bit is a must-have for both commercial and residential drilling needs. With a 3-inch length and square shape, it is designed for easy use with a variety of power tools. The black color and durable construction make it a reliable choice for any job. The package includes one drill bit, suitable for use with a 3-inch bit holder. It is manufactured in China and is compatible with a range of power tools. This drill bit is part of the Irwin brand, known for its quality and reliability. It is perfect for those in need of a reliable drill bit for their power tool collection.