& -We always stand behind our products with top standards of quality. lifetime and superior customer that always puts you first. If you are not with the purchase, we guarantee you a 100% or a replacement. We never stop improving our products and to meet your complete needs. & -- -Constructed with durable solid brass, gives the door viewer peephole a lifetime of durability. It comes in multiple finishes with sleek contemporary design to match your existing hardware and decor, blending in perfectly with various doors. A must safety complement for home, office, hotel and anywhere you need to view who is outside your door before opening.- -It is a breeze to install this door viewer with detailed instruction. Suitable for 1-9/16" to 2-1/6" thick doors, simply drill a small pilot hole as straight as possible, then continue to drill a 1.1" diameter hole on both sides. Insert the viewer into the hole, then screw the two portions together and tighten with the slot on the back. Good Snug fit with wide flanges on both sides to cover drilling flaws. -Heavy Duty Privacy Cover Provides Top Privacy and Security.With the cover in place, no one from outside can see through the viewer into your home even with the reverse peephole. No light will beam through the hole to disturb you anymore with this nice touch. You can open and close the heavy duty back cover flexibly and smoothly. It allows you to identify visitors from a locked door, offering the highest level of privacy for your protection and safety. & -The HD optical glass lens provides a 220-degree sharp and crystal clear panoramic view. It covers the area from the porch ceiling to the doormat, extending to both sides of the doorway across the street.You can spot packages without opening the door and easily see anyone present outside from head to toe. There is no blind spot where a person might lurk, offering you and your family top-level safeguard and security.