Packaging: You will receive 2 spring meter, the Newton gauge is designed in a standard structure, easy to operate Performance: The average error of zero point of this dynamometer: not more than 1/4 degree, the maximum value of repeated weighing at any point: not more than 1/2 degree Function: This is a newton force measuring instrument with a maximum measuring range of 10N. You can also use it to measure the mass of objects within 1kg Application: This spring dynamometer is used as a basic teaching instrument in physics mechanical experiments How to use: Firstly, hang the spring scale vertically on the square bracket, adjust the screw on the back and make the pointer not aligned with the neutral line, then tighten the screw to use, Manufacturer: Huanfeimoerdf