According to the material, the panel handle lock can be divided into space aluminum, stainless steel, copper die-casting, zinc alloy, etc. the space aluminum and stainless steel materials, after surface treatment, are bright and soft. Even if they are corroded by sweat and moisture, they are not easy to fade and rust. Die casting copper handle lock is thick and moderate in price, while some poor quality zinc alloy handle locks are easy to break when used. Because the surface of zinc alloy handle lock is plated with copper, it is not easy to distinguish it from copper die casting handle lock when purchasing. The bottom plates of the two kinds of die casting hand locks can be repeatedly frustrated. The brass colored one is copper die casting handle lock, and the silver white one is zinc alloy handle lock.