Inspired by our original Pendulum door knocker, the AP door knocker maintains the same minimal elegance in a smaller size. Designed with apartment living in mind, the new AP is available with or without an integrated door viewer (also known as a “peephole”). The door viewer provided offers a viewing radius of 160 degrees and is adjustable to fit doors 1 3/8 to 2 inches thick. Available in Brushed Stainless Steel. Made in the USA.