The colors and sizes of these springs follow  ISO 10243  . Made of chrome-silicon steel, they have high tensile strength , long-lasting operation in repetitive applications, such as punching and stamping. All have closed and ground ends, which provide a flat mounting surface for even movement and distribution of loads.

As you squeeze a die spring, it gets harder to push. Rate is the amount of force required for every millimeter of compression. The higher the rate, the harder it is to compress the spring.
 

Our testing faciltis.
We strictly control our springs quality . We do not only promise in oral, let the facilities speak

Our packing and delivery