■材质：尼龙玻纤主体、转轴铁镀锌 ■Matorial： Nylon fiber-body,Zinc plated steel shaft ■适用於厚型门板,挡片上安装尼龙滚轮,易旋转开启及关闭,门框及挡片不刮伤,可调挡片间距,左右开门共用. ■Suitable for heavy duty door,adjustable grip cam latehes.install nylone round cam,easy to open & close.use for right side and left side open door.