Defender Security U 9917 Giant Screen Viewer, Requires a 1-3/4 in. Hole, High-Impact Plastic

A "clear-image" prism allows arms length viewing. High-impact plastic housing requires a 1-3/4" (44 mm) diameter hole. Fit 1-3/8" to 2" (35 to 51 mm) thick doors. Prism image produces a reversed or mirrored image. Each package contains one viewer with installation instructions.

Allows for Arms Length Viewing