The MilwaukeeSHOCKWAVE Impact Duty Alloy Steel Screw Driver Bit Set is a high-quality set of drill bits designed for professional use. With a durable steel construction and a red color, these bits are suitable for use with air drills, drills, and angle grinders. The set includes 13 items, each measuring 4 inches in diameter and depth. Manufactured by Milwaukee, a trusted brand in the industry, this set comes with a 1-year manufacturer warranty and is made in the United States. Perfect for a variety of applications, including mixing, these drill bits are a reliable and efficient tool for any workshop or job site.