the Hdmi Pass Through Wall Plate Allows For A Clean, Professional Looking And Seamless Transition To In-wall Hdmi Cabling Using A Wall Plate Form Factor, Which Offers A More Secure Installation Option Over Traditional Transition Methods. The Decora Style Wall Plate Provides A Secure Mount Within The Wall And Is Not Likely To Be Stolen Or Misplaced. Unlike Traditional Pass-through Wall Plates, This Wall Plate Is Constructed By Using Four-layer Computer Grade Printed Circuit Boards (pcbs).the Pcb Traces Are Engineered To Maintain The Critical Impedance Necessary To Transfer Digital Audio/video Signals. Made From 20 Awg Steel, This Strong Wall Plate Fits Standard Electrical Boxes, And Is Compatible With Decora Style Trim Plates.