The Design House Cambridge Entry Door Knob is designed for left or right-hand doors. The flat ball handle fits comfortably in your hand, and the finish matches your homefoots decor. This knob fits the two most common backsets in the U.S. (2-3/4 inches and 2-3/8 inches). The 1/2 inches latch bolt is plated in nickel and does not budge once in place. With privacy in mind, this product accepts a key on one side of the lock but operates by a turn-button knob on the other side. Use this knob on standard 1-3/8 inches and 1-3/4 inches thick doors. This product has a 1 inch by 2-1/4 inches radius corner faceplate and 5-pin security. 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 and rated for residential security. Designed and manufactured by Design House, the trusted source for quality lighting, hardware, plumbing, kitchen, and bath products for every taste and budget.