Kwikset 83521 RCAL Plain Latch UL 3 Hour for BBL, KNL, CNL, PLL

The 83521 is a replacement round corner adjustable latch (RCAL) for Kwikset deadbolts, and it is the latch unit itself, not a strike or trim plate. Kwikset lists it for the BBL, KNL, CNL and PLL deadbolts. If your deadbolt is one of those four, this is the correct service latch to order.

Round. The 83521 is built with a round corner faceplate, so it drops into a door edge that was routed with a radius corner router or prepped by a bore jig. If the existing latch in your door has square corners, the round corner face will leave the mortise showing at the corners and you want a square corner latch instead.

It is an adjustable backset latch, which is what the AL in RCAL stands for. That means one part covers the door regardless of which of the two standard residential backsets the hole was bored at, so you don't have to measure the bore center before ordering. Extend or collapse the latch to match the deadbolt hub.

The Kwikset 83521 is a plain latch in the RCAL round corner adjustable configuration, supplied in Dark Bronze/Black and Satin Nickel. The Deltana DLE23875 is a drive-in latch with an entry function that fits doors 1-3/8 inch to 2 inch thick. The 83521 uses a round corner faceplate that seats in a mortised faceplate prep; a drive-in latch like the DLE23875 is driven into the bore without a faceplate mortise, so the door prep decides which body suits the opening.

Two: Dark Bronze/Black and Satin Nickel. On a deadbolt the latch face is the only part of this piece that shows, sitting in the door edge against the strike, so match it to the deadbolt trim on the face of the door. For a mixed building the Dark Bronze/Black face reads dark against a stained door and the Satin Nickel against brushed or chrome hardware.

For units running the BBL, KNL, CNL or PLL deadbolt, yes, and the adjustable backset means you don't need to split your stock by 2-3/8 and 2-3/4 doors either. Two finishes is all you carry. Deadbolts outside those four families take their own latch, so walk one door of each type before you standardize on it.

No. It's a deadbolt latch, so the bolt is a plain square bolt thrown by the turn or key rather than a beveled spring latch that has to face the stop. Left hand, right hand, inswing or outswing, the same part goes in.

Not with the 83521. It is a mechanical latch with no wiring or motor, so it only ever moves when the thumbturn or key moves it. A motorized bolt is a different part entirely, such as the Emtek LC9-DBLTCH EMPowered motorized deadbolt latch, and it needs the matching powered lock body behind it rather than a standard mechanical deadbolt.

The Kwikset 83521 is an adjustable latch built for residential door hardware in the RCAL round corner configuration, so one part covers the Kwikset BBL, KNL, CNL and PLL bodies. The Deltana DLP23875 is also adjustable, stating a 2-3/8 inch or 2-3/4 inch backset in a drive-in body with a passage/privacy function, and the Deltana DLE23875 does the same adjustable drive-in job in an entry function for doors 1-3/8 inch to 2 inch thick. The choice comes down to whether the door is prepped for a mortised faceplate or a drive-in collar.

No. The Emtek LC9-DBLTCH is an EMPowered motorized deadbolt latch, a powered latch body driven by the lock's motor. The Kwikset 83521 is a mechanical round corner adjustable plain latch for the Kwikset BBL, KNL, CNL and PLL prep, with no electrical drive. A motorized latch has to be matched to the electronic lock chassis that powers it, so it does not drop into an opening that takes the 83521.

The Kwikset 83521 is a complete round corner adjustable latch body with its faceplate, not a faceplate on its own. The Emtek 83228 is a faceplate and screws part with square corners for a tubular pocket door privacy latch, carrying a privacy/bed/bath function. It replaces trim on an Emtek pocket door privacy latch and does not fit the Kwikset round corner latch, which uses a round corner faceplate.