The Design House 779181 Egg Privacy Door Knob is perfect for bathroom and bedroom doors that require locking. With privacy in mind, this door knob locks from the inside with a turn-button and does not include keyed cylinders. A flat ball knob shape and matte black finish make this door knob versatile in style and design. The 2-way latch door handle is reversible for left or right-hand doors. This locking door knob fits the 2 most common backsets in the U.S. (2-3/4 in. and 2-3/8 in.). The durable 1/2 in. latch bolt is plated in nickel and does not budge once in place. Use this doorknob on standard 1-3/8 in. and 1-3/4 in. thick doors. This product has a 1 in. x 2-1/4 in. radius corner faceplate. If you are preparing your door for installation, the cross bore should be 2-1/8 in. in diameter, and the edge bore should be 1 in. in diameter. This latching door knob is ANSI Grade-3 certified and rated for residential security. By installing the Design House Egg Privacy Lockset in your home, you gain a sense of security and comfort. Designed and manufactured by Design House, the trusted source for quality lighting, hardware, plumbing, kitchen, and bath products for every taste and budget.