WM - Dexter by Schlage J40VBYR609 Byron Privacy Knob, Antique Brass

It's a privacy knob, the function used on bedroom and bathroom doors. Privacy means a push button or turn button on the inside locks the knob, with no key cylinder on the outside and an emergency release instead. If you need a keyed entry knob for an exterior or office door, the privacy function is the wrong one to order.

Antique Brass. In Schlage's finish numbering that's the 609 suffix you see at the end of J40VBYR609, so the whole order code carries the finish. Worth knowing if you're trying to match knobs already hung in a building, the 609 antique brass is a darker, aged brass look rather than a bright polished brass.

Order the same full code on every door: J40 is the privacy function, V BYR is the Byron knob design, and 609 is the antique brass finish. Changing any one of those three pieces changes the look or the function, so a unit-wide refresh should hold all three constant. For closets and hallways in the same units you'd want the passage version of the Byron knob in 609 rather than the J40 privacy, since passage doors don't need a lock button.

Dexter by Schlage is Schlage's residential line, and this Byron privacy knob is a residential door hardware item. It suits apartments, single family homes, and multi-family bedroom and bath doors. For a school, hospital, or other high traffic commercial opening, a heavier commercial cylindrical lockset is the better specification.

No, and that's by design. A privacy function has no key cylinder at all, so it can't be keyed alike or put on a master key system. If you manage a building and need keyed access to those doors, you need a keyed entry or classroom function lock instead, not the J40 privacy.

No. Knob sets in a privacy function are non-handed, the same unit works on a left or right hand door. You install the button side toward the room being secured. Handing only becomes a concern with levers on some lines and with mortise locks.