... ) Material: C50, C67, 1075 3) Usage: shutter spring, band saw, saw, tools Steel strip: 1) Size: 20- 270mm x 0. ... ) Material: C50, C67, 1075 3) Usage: shutter spring, band saw, saw, toolsFeatures of steel strip:1) Color: white yellow, blue, ... , such as saw, automobile clutch, clockwork,spring, band saw, darby, deep draw, barrette, chemical industrial mechanism, textile, standard parts and blade3) ...