GWYL's spring steel is normally supplied with a polishing surface. Other types of surfaces, such as bright-annealed, blue,yellow, polished or plolishing-blue surface can be offered on request. GWYL's wide range of spring steel cover most requirements on material properties. This means that we can deliver strip steel for a wide range of spring applications, such as rolling shutter spring,flat spring,hand building tools,bandsaw blade.etc.