The Mitutoyo Calibration Tool is a high-quality power tool accessory suitable for calibration purposes. With a 12-13" size and a precision of 0.001", this drill bit is perfect for creating accurate and reliable holes in various materials. The package quantity includes one tool, making it a great addition to any toolbox.Made by the trusted brand Mitutoyo, this calibration tool is a must-have for any DIY enthusiast or professional tradesperson. Its durable construction ensures long-lasting use, while its precision and accuracy make it an ideal choice for a variety of applications. Whether you're working in wood, metal, or other materials, this drill bit is sure to get the job done with ease.not calibrated.