PT. GLOBAL BANGUN MANDIRI (GBM) is a supplier of leading brands of door and window hardware. GBM offers an extensive product range of high-quality hinges from SIMONSWERK's MANUFACTURER in Germany. GBM also supplies door and window handles from HOPPE Germany, sliding door systems from HENDERSON UK and METALGLAS Italy, Lockcases and cylinders with non and master key system from CES Germany.