For more than 100 years we have been offering our customers a complete range of construction fittings and security equipment for windows and doors. Always coming out with new ideas, Gretsch-Unitas is constantly "Securing technology for you". For years now, such renowned names as BKS (locking technology), FERCO (hardware) and GU Automatic (automatic entrance systems) belong to our group. G.U-Logistik organises the worldwide shipment of G.U quality products, the affiliate AGENA is concerned with all IT tasks of the group.