Hold hand lock material classification

By material, the handle lock covers space aluminum, stainless steel, die-cast copper and zinc alloy, but space aluminum and stainless steel are the most advanced of all, and show bright color and gentle hand feel and are difficult to fade and rust by sweat and humidity after processed with surface technics. Die-cast copper handle lock is massive, and has moderate cost, but some inferior zinc alloy handle locks are easy to break in use. Because the surface of zinc alloy lock is copperized, it is necessary to differentiate it with die-cast copper handle lock with a rasp, by rasping, the brassy one is die-cast copper handle lock, and the argenteous one is zinc alloy handle lock.