The Design House Cambridge Universal Latch/6-Way Latch Passage Door Knob is best suited for bedrooms or closets and does not lock. This knob 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. This flat ball knob does not include keyed cylinders. Passage knobs do not lock and are used in bedrooms and closets. Use this knob on standard 1-3/8-inch and 1-3/4-inch thick doors. his product has a 1-inch drive-in latch, 2-1/4-inch radius corner face plate, square corner face plate, 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, which means this knob is 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.