... , nylon wall plug, steel wall plug, nylon frame anchors, metal frame anchors, bolt anchors, hollow wall anchors and so on ... market, and there are almost 2000 varieties also.The main metal surface treatment is white zinc plated, yellow zinc plated, ... international traveling trader and would appreciate the advice wholeheartedly. Spring toggle 1.gravity toggle2.iron with zinc plated or stainless steel3 ...