General Purpose58 pcs set screw pitch US+Metric+Inch system. Typically used to check thread size for . Special DesignNarrow rabbet notch designed to measure external and internal threads even in small holes, can be rotated toggle dial, easy and convenient. PracticalThick forging products, single thickness of 0.5mm, easy to wear. Very convenient gauge to determine thread pitch, all sheets are clearly etched with size. PortablePortable measuring tools, with graduated scale, useful thread pitch for inspection. Can be used to measure US system + Metric system + Inch. Stainless Steel MaterialStainless steel material strong enough for long service time. Useful Screw Pitch Gauge Tool Set for home DIY or bussiness and industry. Product Size: 66*13mm Product color: silver Delivery quantity: One piece