The Performance Tool W8655 Thread Pitch Gauge Set SAE/Mm is a must-have tool for any mechanic or DIY enthusiast. This multipurpose tool is used to determine thread per-Inch/cm on screws, bolts or in a tapped hole, making it an essential addition to any toolbox. This set includes 28 standard and 24 metric thread gauges, providing a comprehensive solution for determining thread pitch on a variety of screws, bolts or in a tapped hole. Both SAE and metric thread gauges are conveniently divided in one metal holder, making it easy to locate and choose the correct gauge without hunting for it. The tool is constructed from high-quality materials, ensuring a long life and accurate readings. The common thread angle of 60 degrees provides accurate and reliable measurements, with the SAE gauge measuring from 4 to 62 threads per-Inch and the metric gauge measuring from 0.25 to 6.0 threads per cm, making it suitable for a wide range of applications.