Kwikset 83186 Adjustable Drive-in Deadbolt Replacement Latch

Both. The 83186 is an adjustable latch, so the one part covers a 2-3/8 inch backset and a 2-3/4 inch backset and you set it at the door during install. Backset is measured from the edge of the door to the center of the bored hole, and 2-3/8 and 2-3/4 are the two backsets you'll find on residential deadbolts, so you don't have to get under the old bolt and measure before you order.

No chisel, no router. The 83186 is a drive-in latch, meaning it presses straight into the bored hole in the door edge and the collar seats against the edge itself. There's no rectangular pocket to cut for a faceplate, and Kwikset states no special door preparation is required. That's the reason to reach for this one on a finished or painted door where you don't want to be cutting the edge.

That's exactly what it's for. Kwikset lists the 83186 as a direct replacement for its deadbolt latches, and because it adjusts to either 2-3/8 or 2-3/4 backset it matches whichever way your door was bored. You're replacing the latch only, so the deadbolt body, the cylinder, and your keys all stay as they are and the keying doesn't change.

No, and it's worth catching before you order. The 83186 is a deadbolt latch: the bolt is thrown and retracted only when someone turns the thumbturn or the key. A knob or lever set uses a spring latch with a beveled face that pushes back on its own when the door swings shut. The two are not interchangeable even on the same brand of lock. For a knob or lever you need a spring latch of the matching backset; for a deadbolt, this is the part.

Same bolt, different edge treatment. A drive-in latch like the 83186 presses into the round bore in the door edge and nothing gets cut into the door. A plate-style latch has a flat faceplate that has to sit flush, which means a shallow rectangular mortise routed into the edge. Look at the door before you decide: if the edge is plain with just the round hole, drive-in goes back in clean. If the edge already has a mortised pocket from a plate-style latch, a drive-in bolt will leave that pocket showing, and you'd want a faceplate latch instead.

One part number covers the lot. The 83186 is a single model that adjusts to either backset, so there's no need to split your shelf or your truck stock two ways or to work out which door is which before heading over. Being drive-in, a swap doesn't call for any door prep either, which matters when you're doing them one unit at a time on occupied doors.