The 905 classic egg knob style is considered traditional and vintage. On the larger square rosette, this knob brings definition to any door. The knob is smooth in all of its curves and has the highest residential ANSI Grade 2 Security rating. Privacy function is typically used on bathroom or bedroom doors. This privacy is also panic proof, which allows you to exit quickly in one swift motion of operating the lever. Push button on the interior and a privacy pin hole to unlock the door from the exterior. Easy to install and used on diy projects, new construction and remodel.