The Cyclops door viewer is a high technology product made with four precision glass lenses to assure a clear 290°degree full view. Submarine periscope technology, optic system, wide angle lens and long range. The lenses are made with an aluminum structure which does not rust and is resistant to the discoloration caused by outside weather. Weather resistant and color fading resistant. Installation At convenient high, mark a circle of 5/8 inch at your door To drill hole use a 5/8 inch wood drill, open hole carefully without drilling the door all the way through, then finish opening the hole from the other side. Once the hole is clear, unscrew door viewer, insert the front section into the hole from outside of the door, then insert rear section from inside, and screw both sections together

Product Features

• Submarine periscope technology, optic system, wide angle lens and long range.
• Made with four precision glass lenses to assure a clear 290°degree full view
• For Doors 1 3/8″ to 2″ thick (your standard size)
• You can easily install it in 5 minutes
• Weather resistant and color fading resistant