Material: brass, anti-electromagnetic rust. It is packed in an iron box for easy access. Multiple applications: can be used for anything from guitars to engines; including metric and SAE standard sizes (mm) Measuring gap: Use this sensor when you need to measure the gap width quickly and easily. Machinery industry, high-tech equipment, measuring gaps, compressor manufacturers, testing machine tools, special fastening surfaces and fastening surfaces, pistonring grooves and piston rings, cylinders and pistons, crosshead slides and guides, air intake and The size of the gap between the top of the exhaust valve and the two opposite surfaces, such as the gap between the rocker arm and the gear mesh. Model and accuracy: 0.05 mm-1 mm Size: 100 mm * 13 mm Blade length: 100 mm Blade number: 13 sheets (page) Color: Brass | Material Type: Copper Use the feel to keep your hands clean and dry, do not wear gloves. Wipe away the dust and grease on the touch to avoid affecting the measurement accuracy. The sensor should not be pressed into the measurement gap during measurement to prevent the sensor from bending or breaking. The feel ruler is relatively thin and sharp, which can prevent scratches on hands or other body parts. The temperature at which the workpiece cannot be used is high. After use, the sensor should be wiped clean and coated with a thin layer of industrial lubricant, and then the sensor should be folded back into the fixture to prevent corrosion, bending, deformation and damage. In order to measure and adjust the gap, first select a comfortable ruler that meets the gap requirements and insert it into the measurement gap, and then pull the sensor during adjustment until the lock nut is tightened and feel light resistance. At thistime, I feel that the size scale marked is the measured gap value. When storing, don't put the feeling underneath