1)Zinc / aluminum alloy,etc. 2)ISO9001:2000 3)Shining but elegant metal surface ... of the lock Lock body Cylinder Finshbrass/stainless steel/zinc/aluminum/iron material. series of 50mm, 57mm, 58mm, 72mm, 85mm,etc ... copper) GP(gold plated We are specialized manufacturer of door handle & locks, which are exported and popular in many countries, especially ...