CMI - PR4 - Premier Safe (TDR)PR4 MODEL HIGH SECURITY SAFE FOR THE SECURITY CONSIOUS CMI PREMIER T. D. R.: The design of the safes and materials used provide defence barriers resisting to: Oxy Acetylene attack Drills and abrasive grinders Explosives and force Pneumatic and hydraulic tools BODY: The body gives a minimum thickness of 80mm of high density refractory materials at all points. These materials are bonded between inner and outer walls of specially reinforced steel,