Emtek 8081 Quincy 3-5/8" C-to-C Keyed Sideplate Lockset, Passage/Double Keyed - Brass Tubular

Both. The 8081 Quincy keyed sideplate set covers 1-3/8 inch through 1-3/4 inch doors, which takes in older interior doors as well as standard exterior slabs. There's a door thickness field on the order form, so give the actual measured thickness of your slab when you order.

One standard 2-1/8 inch cross bore is all the boring it needs, so a door already prepped for a common bored knob or lever set is the right starting point. Backset is adjustable between 2-3/8 and 2-3/4 inches, the two standard bored-lock backsets, so an existing hole centered at either distance from the edge works. What it does add over a plain rosette set is the sideplate: the plate is 3-5/8 inch center to center, so it covers a longer strip of the door face than a round rose and you need clear stile face for it.

Double cylinder, meaning it takes a key from inside as well as outside. That's the setup people pick for a door with glass beside or in it, since there's no thumbturn an arm can reach through and flip. If you want a key outside and a turn inside, the 8081 double keyed configuration is not it, and be aware that some jurisdictions restrict double cylinder locks on required egress doors.

For a lever, yes, and it's a required choice, right hand or left hand. Knobs are symmetrical so handing doesn't change the part, but the order form asks for it either way. Stand outside the door: the side the hinges are on is the hand.

It's a residential-rated lock, solid brass throughout, and that's where it belongs: houses, condo units, interior suite doors. For a commercial opening with traffic and a code inspector, a residential tubular set is the wrong tool and you want a Grade 1 or Grade 2 commercial cylindrical or mortise lock instead. The 8081 works well on the unit doors inside a building, less so on the front entrance everyone uses.

The 8081 double keyed configuration takes a key on both faces, no exception. For a plate-style lever lock with a key outside only, the Omnia D12036A is a single cylinder deadbolt lever lockset in solid brass. Single cylinder is the safer choice on a door that's part of an escape route; the double cylinder is what you use when glass in or beside the door makes a reachable thumbturn the bigger risk.

The Omnia D12036AC is the nearest cross-brand match. Like the Emtek 8081 Quincy, it is a solid brass sideplate lockset with a double cylinder keyed function, so both take a key from the inside as well as the outside - the arrangement used on doors with glass alongside the lock. The Emtek 8081 is a tubular lockset with 3-5/8 inch center-to-center spacing between the knob or lever and the keyed cylinder, so confirm the sideplate hole spacing on the Omnia against your existing door prep before treating one as a drop-in for the other.

The Emtek 8081 Quincy is a double cylinder set, keyed on both faces. Where a thumbturn on the interior is wanted instead - the usual choice on a bedroom-to-hall or garage entry door, and the arrangement many egress codes expect on a primary exit - the Omnia D12036A is a single cylinder brass lever lockset. It is the same sideplate style of set with the interior key replaced by turn operation.

The Omnia D12036PD is a double dummy sideplate lever set. It carries the same sideplate appearance but is a surface-mounted trim with no latch and no cylinder - it does not operate or secure anything, and it is specified for the inactive leaf of a pair or a closet door that latches by other means. The Emtek 8081 Quincy is a keyed entry lockset, sold complete with the latch and strike plate. If you are matching the look of a dummy leaf to a working 8081, order the dummy separately rather than expecting the two to interchange. The Omnia dummy is also a 5-1/2 inch center-to-center set, against 3-5/8 inch on the Emtek 8081, so the two do not share a hole pattern.

It ships as a complete set, knob or lever, the latch, and the strike plate. You still specify the inside trim style, the backset, the handing, and the keying. Nothing separate is needed for the latch or strike. If you want a matching deadbolt above it, that's a separate purchase.

Any Emtek brass knob or lever style works with it, and the trim list is long, over eighty choices. It spans plain levers (Stuttgart, Athena, Hermes, Luzern, Poseidon, Argos, Basel, Geneva, Milano, Turino, Coventry), knobs (Ace, Spoke, Orb, Round, Egg, Melon, Providence, Waverly, Octagon, Square), textured bar and square designs (L-Square, T-Bar and R-Bar in faceted, hammered, knurled, Tribeca and white marble), and crystal knobs (Bristol, Windsor, Diamond, Georgetown, Hampton, Old Town, Providence). Trim is a required selection at order time.

Keying is chosen when you order: keyed different if each door should carry its own key, or keyed alike so one key runs every lock in the group. There's also a keying-to-code field if you're matching an existing key code already in the building, which is how you add a door to a system that's already in place rather than rekeying everything.

Eight, and they cover the usual matching problems: Oil Rubbed Bronze (US10B), Satin Nickel (US15), Pewter (US15A), Flat Black (US19), Polished Chrome (US26), Polished Brass Lifetime (US3), Unlacquered Brass (US3NL), and French Antique (US7). Two of those behave differently over time. Unlacquered brass is meant to patina and will darken with handling; Polished Brass Lifetime is coated to stay bright. If you're matching existing hardware in a building, that distinction matters more than the color name.

Yes. The latch faceplate comes round corner or square corner, so it matches either a routed square mortise in the door edge or a drilled round prep. That's what lets it go into an existing door without recutting the edge.

Different mechanism behind the same long-plate look. The Emtek 8081 Quincy is a tubular bored lockset, one 2-1/8 inch cross bore, with the cylinder in the plate. The Omnia D12036AC is a double cylinder deadbolt lever lockset in solid brass with a sideplate, so the locking element is a deadbolt rather than a keyed latch. Omnia also does the same body single cylinder as the D12036A, key outside and turn inside, and as a double dummy with no operation at all, the D12036PD at 5-1/2 inch center to center, for the inactive leaf of a pair. The Emtek's plate is 3-5/8 inch center to center, so the two are not interchangeable in an existing plate footprint.

You want a dummy version, which has the same plate and trim but no latch and no cylinder, so it just gives you something to pull. The Omnia D12036PD is a solid brass dummy deadbolt lever lockset with plates at 5-1/2 inch center to center. Note the Emtek 8081 Quincy plate is 3-5/8 inch center to center, so the two won't look identical side by side; if you need the trim to match exactly across doors, stay within one brand's plate family.

Not across the board. The Emtek 8081 Quincy is a 3-5/8 inch center-to-center set. The Omnia D12036PD is a 5-1/2 inch center-to-center set, so it lands on a different sideplate bore pattern entirely. Center-to-center is the dimension that decides whether a replacement drops into the existing door without a new prep, so measure from the center of the knob or lever bore to the center of the cylinder bore on the door in front of you and order to that number rather than by family name.

The Omnia D12036A, D12036AC and D12036PD are all lever sets. The Emtek 8081 Quincy takes either a knob or a lever on the inside trim, chosen from the brass knob and lever styles, so a knob interior is available on the Emtek where the Omnia sets are lever only. Handing has to be specified when a lever is chosen on the 8081; a knob does not require it.