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11 models to compare

How big are these keyed deadbolts, and what grade?

Ten of the 11 stand 2-7/16 to 2-11/16 in tall and just as wide. Kwikset labels three models Grade 3, three Grade 2 and five AAA.

Grade labels use different systems.

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With no preferences selected: 158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel is one option to compare.

No hands-on testingMethod and sources

158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel · first with a product link

Model / item: 158-RDT-15-SMT
  • Assembled width: 2 17/32 in.
  • Assembled height: 2 17/32 in.
What to note:

Assembled length: 15/16 in.

View at Kwikset

If you choose Up to 2 7/16 in for assembled height, the first option with a product link becomes 660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel.

11 models compared; 11 have a product-page link.

The picks

5 options to compare

Compare the details that matter to your setup.

An option to compare

158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

Assembled width: 2 17/32 in.

Model / item: 158-RDT-15-SMT

Key details

  • Assembled height: 2 17/32 in.

What to note

Assembled length: 15/16 in.

Assembled width: 2 17/32 inAssembled height: 2 17/32 inAssembled length: 15/16 in
See all 4 specs
Assembled width2 17/32 in
Assembled height2 17/32 in
Assembled length15/16 in
Maker grade labelGrade 2

4 of 4 specs available · source checked September 26, 2026 · Source ↗
Kwikset · Product page checked September 26, 2026

View at Kwikset
Assembled height: Up to 2 7/16 in

660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel

Assembled width: 2 7/16 in.

Model / item: 660RDT 15 SMT

Key details

  • Assembled height: 2 7/16 in.

What to note

Assembled length: 1 1/16 in.

Assembled width: 2 7/16 inAssembled height: 2 7/16 inAssembled length: 1 1/16 in
See all 4 specs
Assembled width2 7/16 in
Assembled height2 7/16 in
Assembled length1 1/16 in
Maker grade labelGrade 3

4 of 4 specs available · source checked September 26, 2026 · Source ↗
Kwikset · Product page checked September 26, 2026

View at Kwikset
Assembled length: Up to 1/2 in

258 Crosstown Deadbolt (Rectangle) - Keyed One Side - featuring SmartKey — Satin Nickel

Assembled width: 2 25/32 in.

Model / item: 258-TRCT-15-SMT

Key details

  • Assembled height: 3 9/16 in.

What to note

Assembled length: 1/2 in.

Assembled width: 2 25/32 inAssembled height: 3 9/16 inAssembled length: 1/2 in
See all 4 specs
Assembled width2 25/32 in
Assembled height3 9/16 in
Assembled length1/2 in
Maker grade labelAAA

4 of 4 specs available · source checked September 26, 2026 · Source ↗
Kwikset · Product page checked September 26, 2026

View at Kwikset
Also compare 4

158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

Assembled width: 2 19/32 in.

Model / item: 158-SQT-15-SMT

Key details

  • Assembled height: 2 19/32 in.

What to note

Assembled length: 1 13/32 in.

Assembled width: 2 19/32 inAssembled height: 2 19/32 inAssembled length: 1 13/32 in
See all 4 specs
Assembled width2 19/32 in
Assembled height2 19/32 in
Assembled length1 13/32 in
Maker grade labelGrade 2

4 of 4 specs available · source checked September 26, 2026 · Source ↗
Kwikset · Product page checked September 26, 2026

View at Kwikset
Also compare 5

258 Hometown Deadbolt (Round) - Keyed One Side - featuring SmartKey — Satin Nickel

Assembled width: 2 21/32 in.

Model / item: 258-15-SMT

Key details

  • Assembled height: 2 21/32 in.

What to note

Assembled length: 1/2 in.

Assembled width: 2 21/32 inAssembled height: 2 21/32 inAssembled length: 1/2 in
See all 4 specs
Assembled width2 21/32 in
Assembled height2 21/32 in
Assembled length1/2 in
Maker grade labelAAA

4 of 4 specs available · source checked September 26, 2026 · Source ↗
Kwikset · Product page checked September 26, 2026

View at Kwikset

Comparing 158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel · 158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

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The facts that differ

Choose up to three models to compare side by side.

1 identical spec shown. Details that do not apply to these models are omitted.

Published specification comparison
Spec158 Deadbolt - Keyed One Side - featuring SmartKey — Satin NickelModel / item: 158-RDT-15-SMTNo preferences selected.158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin NickelModel / item: 158-SQT-15-SMTNo preferences selected.
Assembled width2 17/32 in2 19/32 in
Assembled height2 17/32 in2 19/32 in
Assembled length15/16 in1 13/32 in
Maker grade labelGrade 2Grade 2

158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

Model / item: 158-RDT-15-SMT

No preferences selected.

Assembled width
2 17/32 in
Assembled height
2 17/32 in
Assembled length
15/16 in
Maker grade label
Grade 2

158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

Model / item: 158-SQT-15-SMT

No preferences selected.

Assembled width
2 19/32 in
Assembled height
2 19/32 in
Assembled length
1 13/32 in
Maker grade label
Grade 2

158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

View at Kwikset

158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel

View at Kwikset

Compare all 11 models

— = no verified listing yet. The published order is independent of links.

All models and their decision specs
ProductHow it comparesKey specCompareAction
158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 17/32 in vs 2 19/32 in.
Model / item: 158-RDT-15-SMT		Assembled width: 2 17/32 inView at Kwikset
158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 258 Crosstown Deadbolt (Rectangle) - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 19/32 in vs 2 25/32 in.
Model / item: 158-SQT-15-SMT		Assembled width: 2 19/32 inView at Kwikset
258 Crosstown Deadbolt (Rectangle) - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 258 Hometown Deadbolt (Round) - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 25/32 in vs 2 21/32 in.
Model / item: 258-TRCT-15-SMT		Assembled width: 2 25/32 inView at Kwikset
258 Hometown Deadbolt (Round) - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel: assembled width, 2 21/32 in vs 2 7/16 in.
Model / item: 258-15-SMT		Assembled width: 2 21/32 inView at Kwikset
660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel
Compared with 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 7/16 in vs 2 5/8 in.
Model / item: 660RDT 15 SMT		Assembled width: 2 7/16 inView at Kwikset
660 Contemporary Square Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel
Compared with 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 7/16 in vs 2 5/8 in.
Model / item: 660SQT-15-SMT		Assembled width: 2 7/16 inView at Kwikset
660 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 7/16 in vs 2 5/8 in.
Model / item: 660 15 SMT		Assembled width: 2 7/16 inView at Kwikset
158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 17/32 in vs 2 19/32 in.
Model / item: 158-RDT-15-SMT
Assembled width: 2 17/32 in
View at Kwikset
158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 258 Crosstown Deadbolt (Rectangle) - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 19/32 in vs 2 25/32 in.
Model / item: 158-SQT-15-SMT
Assembled width: 2 19/32 in
View at Kwikset
258 Crosstown Deadbolt (Rectangle) - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 258 Hometown Deadbolt (Round) - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 25/32 in vs 2 21/32 in.
Model / item: 258-TRCT-15-SMT
Assembled width: 2 25/32 in
View at Kwikset
258 Hometown Deadbolt (Round) - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel: assembled width, 2 21/32 in vs 2 7/16 in.
Model / item: 258-15-SMT
Assembled width: 2 21/32 in
View at Kwikset
660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel
Compared with 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 7/16 in vs 2 5/8 in.
Model / item: 660RDT 15 SMT
Assembled width: 2 7/16 in
View at Kwikset
660 Contemporary Square Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel
Compared with 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 7/16 in vs 2 5/8 in.
Model / item: 660SQT-15-SMT
Assembled width: 2 7/16 in
View at Kwikset
660 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel
Compared with 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: assembled width, 2 7/16 in vs 2 5/8 in.
Model / item: 660 15 SMT
Assembled width: 2 7/16 in
View at Kwikset
11 catalog models

How the comparison works

Your choices are compared with each model’s product details. A missing or conflicting value stays unknown and cannot satisfy a choice you select. The starting order helps you browse; it does not rate real-world performance.

Source dates appear with each link below. A source date does not confirm today's price or stock.

Finder methodologyReport a correction
Sources for all 11 models
  • 158 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 158 Square Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 258 Crosstown Deadbolt (Rectangle) - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 258 Hometown Deadbolt (Round) - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 660 Contemporary Round Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 660 Contemporary Square Deadbolt - Keyed One Side - Featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 660 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 780 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • 980 Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • Midtown Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026
  • Uptown Deadbolt - Keyed One Side - featuring SmartKey — Satin Nickel: Source 1 ↗ · September 26, 2026

A slim deadbolt still needs the right door prep

Kwikset's Midtown, Crosstown and Hometown deadbolts each have an assembled length of 0.5 in. That shared dimension does not give them the same face shape: compare height and width as well as length if you are replacing hardware within an existing trim outline.

The 11 deadbolts share a maximum door thickness of 1.75 in. Read the minimum thickness, bore and backset in the exact installation drawing too; exterior dimensions alone cannot answer whether the latch fits your door. Keying configuration and the interior operating hardware also need to match the door's use.

AAA and numeric grades are different choices here

Midtown and Uptown carry Kwikset's AAA label; the Contemporary Round deadbolt carries Grade 3. The finder keeps those labels separate rather than translating them into a common security rating. Its comparison comes from Kwikset documentation, without a break-in or wear trial.

Choose the finish and body shape after the installation details are settled. A matching grade label does not mean matching dimensions, and a compact exterior is no substitute for the correct locking and release arrangement.

Before you buy

Is AAA better than Grade 2?

The pages don't say how the two relate. Kwikset prints AAA in the same ANSI Grade field where other models show Grade 2 or Grade 3, so the finder keeps the three labels apart instead of ordering them; the certification details for the exact model are where to compare them. Ten of the 11 stand 2-7/16 to 2-11/16 in tall and just as wide. Kwikset labels three models Grade 3, three Grade 2 and five AAA. The three 660s are smallest. They're Grade 3, while four AAA designs are the shortest, 1/2 to 9/16 in long.

Will one of these fit my door?

Every model is rated for doors 1-3/8 to 1-3/4 in thick, and the rectangular 258 Crosstown needs the most face room, 3-9/16 in tall by 2-25/32 in wide. Bore and backset aren't compared here, because Kwikset's cross-bore values disagree across related products, so hold the exact model's installation guide up to your door before you drill.

Do any of these take a key on both sides?

All eleven models are labeled Keyed One Side. For a different locking arrangement, check the exact model's installation guide and the applicable fire and egress requirements before buying.