National Hardware N328-427 V802 Door Viewer in Satin Nickel Authorized Replacement for Stanley Hardware Stock #N328-427 Used to allow a user to identify visitors from the security of a locked door Fits doors 1-3/8 inch to 2 inches thick Offers 160 degrees lens angle for wide viewing Requires 1/2 inch hole Solid brass housing Satin nickel finish 1/2-Inch diameter body