The Design House 728089 Terrace Universal Latch Entry Door Knob accepts a key on one side of the lock but is operated by a turn-button knob on the other side. This knob is finished in Polished Brass, designed for left or right hand doors and fits the two most common backsets in the U.S. (2-3/4-inch and 2-3/8-inch). The 1/2-inch latch bolt is plated in nickel and does not budge once in place. Entry knobs are often used on front doors and inside homes. Use this knob on standard 1-3/8-inch and 1-3/4-inch thick doors. This product has a 6-way universal latch, 1 inch x 2-1/4-inch radius corner face plate, and standard radius corner face plate. If you are preparing your door for installation, the cross bore should be 2-1/8 inches in diameter and the edge bore should be 1-inch in diameter. This product is ANSI Grade-3 certified, which means this knob is rated for residential security.