KWIKSET 660-3S.STRKP Single Cylinder Deadbolt Smartkey 199394010327 660-S

( Brand: Kwikset ), ( Manufacturer Part Number: 660-3S.STRKP ), ( Model: 660-S ), ( Type: Door Hardware ), ( Color: Brass ), ( Item Height: 3 In ), ( Item Width: In ), ( Features: Kwikset 660-s 660 Series Deadbolt Single Cylinder ), ( California Prop 65 Warning: No ), ( Collection: 660-series ), ( UPC: 199394010327 )

Review KWIKSET Brass Single Cylinder Deadbolt Smartkey

The **Kwikset 660-3S STRKP SmartKey Single Cylinder Deadbolt** represents a seamless blend of cutting-edge smart home technology and traditional security, offering homeowners both convenience and peace of mind. Engineered with Kwikset s renowned durability and precision, this deadbolt features a sleek, modern design that effortlessly complements a wide range of door styles, from classic to contemporary. At its core, the 660-3S leverages **SmartKey technology**, a proprietary system that eliminates the need for traditional keys by allowing users to rekey the lock with a simple tool no locksmith required. This innovation not only enhances security by reducing the risk of lost or stolen keys but also simplifies the process of changing locks for renters or homeowners moving into a new space. The **single-cylinder mechanism** ensures a smooth, quiet operation with a 1-inch throw, providing a secure latch while maintaining ease of use. Compatible with **Z-Wave** smart home platforms, this deadbolt can be seamlessly integrated into existing smart ecosystems, allowing for remote control, automation, and monitoring through compatible apps like Kwikset Home or third-party systems like Alexa, Google Assistant, or HomeKit. Whether you re locking up from your smartphone after a long day or setting up automated routines like locking the door at sunset this deadbolt adapts to your lifestyle. The **weather-resistant construction** ensures reliable performance in varying climates, while the **durable stainless steel components** guarantee long-term resistance to wear and corrosion. With its **one-inch bore** and **ANSI Grade 1 security rating**, the 660-3S delivers enterprise-level protection against forced entry, making it an ideal choice for both residential and light-commercial applications. Whether you prioritize smart convenience, security, or ease of maintenance, the Kwikset 660-3S STRKP SmartKey deadbolt delivers a future-proof solution that combines the best of traditional craftsmanship with the flexibility of modern technology.

The **Kwikset 660-3S STRKP (660-S) Single Cylinder Deadbolt with SmartKey** is a popular smart lock designed for enhanced security and convenience. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **SmartKey Technology**

The SmartKey system allows homeowners to rekey the lock without needing a locksmith. This is particularly useful for renters or those who frequently change locks. The system uses a proprietary keyway that is harder to duplicate than standard keys, reducing the risk of unauthorized rekeying.

2. **High Security Features**

The 660-S features a **Grade 1 security rating** from the American National Standards Institute (ANSI), indicating strong resistance to picking, drilling, and bumping. It also includes a **one-inch throwbolt** for added security when the door is closed.

3. **Compatibility with Smart Home Ecosystems**

The lock is compatible with **Z-Wave** and can integrate with smart home platforms like **SmartThings, Home Assistant, or Alexa**. This allows for remote control, automation, and monitoring via a smartphone app. Users can lock/unlock the door, receive alerts, and even set schedules for locking/unlocking.

4. **Durability and Build Quality**

Kwikset is a well-known brand with a reputation for durability. The 660-S is made with sturdy materials, including a **brass interior** for longevity and resistance to wear. The exterior is typically made of metal or high-quality plastic, ensuring it can withstand frequent use.

5. **Easy Installation**

The lock is designed for straightforward installation, though some users may need basic tools like a screwdriver. Kwikset provides clear instructions, and many users report that the process takes less than an hour. It is also compatible with most standard door preps, though measurements should be verified before purchase.

6. **Aesthetic Appeal**

The 660-S comes in a variety of finishes (e.g., brushed nickel, oil rubbed bronze, satin nickel) to match different door styles and home decor. The sleek design is modern and blends well with contemporary interiors.

7. **No Battery Dependency for Basic Functionality**

Unlike some smart locks, the 660-S does not require batteries for the mechanical deadbolt to function. The smart features (like remote locking/unlocking) rely on batteries, but the physical security remains intact if the batteries die.

8. **Renter-Friendly**

Since the lock can be rekeyed easily, it is ideal for renters who may need to change locks frequently without the hassle of dealing with a landlord or locksmith.

9. **Compatibility with Traditional Keys**

The lock retains the functionality of a traditional keyed deadbolt, which can be a plus for those who prefer physical access in case of smart system failures or power outages.

10. **Good Customer Support and Warranty**

Kwikset offers a **limited lifetime warranty** on the lock mechanism, providing peace of mind against manufacturing defects. Their customer support is generally responsive, though response times can vary.

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### **Cons**

1. **Smart Features Require Additional Hardware**

To fully utilize the smart features (e.g., remote access, automation), you need a **Z-Wave hub** (like SmartThings) or a compatible smart home system. This adds to the upfront cost and complexity, as users must invest in additional devices to make the lock truly "smart."

2. **Battery Dependency for Smart Functions**

While the mechanical deadbolt works without batteries, the smart features (like unlocking via app or voice command) rely on batteries. Users must remember to replace batteries periodically (typically every 6 12 months), or the smart functionality will be lost. Some users report that battery life can be inconsistent, especially in extreme temperatures.

3. **Limited Integration Options**

While the 660-S works with Z-Wave, it does not support **Wi-Fi or Bluetooth** directly. This means you cannot connect it to platforms like **Google Home or Apple HomeKit** without a Z-Wave hub. Some users may find this limiting if they prefer cloud-based or non-Z-Wave ecosystems.

4. **Potential Learning Curve for Smart Features**

Setting up and configuring the smart features can be overwhelming for users who are not tech-savvy. Users must download apps, create accounts, and troubleshoot connectivity issues, which may require patience and technical knowledge.

5. **Cost**

The 660-S is more expensive than a standard mechanical deadbolt. While the price is reasonable for a smart lock, it may still be a significant investment for those on a tight budget. Additional costs for a Z-Wave hub or other smart home devices will further increase the total expense.

6. **Installation Challenges for Some Users**

While the installation is generally straightforward, users with limited experience may struggle with aligning the strike plate or ensuring the lock operates smoothly. Improper installation can lead to issues like sticking or misalignment, which may require re-installation.

7. **Compatibility Issues with Certain Doors**

The lock may not fit perfectly on doors with non-standard preps (e.g., very thick or thin doors, or those with pre-existing deadbolt holes that are not aligned correctly). Users must measure their door carefully before purchasing to avoid compatibility issues.

8. **No Built-in Keypad**

Unlike some smart locks (e.g., August or Schlage), the 660-S does not include a built-in keypad. This means users must rely on keys or the app for access, which some may find less convenient than a keyless entry option.

9. **Dependence on Smart System for Convenience**

If the smart system fails (e.g., app crashes, hub issues, or internet outages), users may be locked out unless they have a physical key. This is a trade-off for the convenience of smart features.

10. **Resale Value and Compatibility**

Since smart locks are still relatively niche, reselling the 660-S may be difficult, and potential buyers may require additional hardware (like a Z-Wave hub) to use it fully. This could limit its appeal to future owners.

---

### **Conclusion**

The **Kwikset 660-S STRKP Single Cylinder Deadbolt with SmartKey** is an excellent choice for those seeking a **high-security, smart-enabled deadbolt** that balances convenience and traditional functionality. Its **SmartKey technology** makes it ideal for renters or those who frequently change locks, while its **Grade 1 security rating** ensures robust protection against break-ins. The integration with **Z-Wave smart home systems** adds significant value for users who want remote access and automation, though this does require additional hardware.

However, the lock s **smart features come with trade-offs**, including the need for batteries, a learning curve for setup, and dependence on a Z-Wave hub for full functionality. It is not a true "keyless" lock, and its smart capabilities are limited compared to locks with built-in keypads or Wi-Fi connectivity.

For users who prioritize **security, rekeyability, and smart home integration** without needing advanced keyless features, the 660-S is a strong and reliable option. Those who prefer **simpler, battery-free smart locks** or have limited smart home infrastructure may find alternatives like the **August Smart Lock Pro** or **Schlage Encode** more suitable.

---

### **Recommendation**

- You want a **high-security deadbolt** with **SmartKey rekeyability** for renters or frequent lock changes.

- You already have or plan to invest in a **Z-Wave smart home system** (e.g., SmartThings).

- You value **traditional key access** alongside smart features.

- You are comfortable with **basic installation** and setting up smart home integrations.

- You prioritize **durability and brand reliability** over advanced keyless entry.

- You want a **true keyless lock** with a built-in keypad (e.g., August Smart Lock Pro).

- You prefer **Wi-Fi or Bluetooth connectivity** without needing a hub (e.g., Yale Assure Lock).

- You are on a tight budget and want a **simpler, non-smart deadbolt** (e.g., a standard Grade 1 deadbolt).

- You are not interested in smart home automation and want a **battery-free solution**.

Overall, the Kwikset 660-S is a **solid mid-range smart lock** that excels in security and rekeyability, making it a practical choice for many homeowners. However, its smart features are best utilized within a broader smart home ecosystem.

Details:

Product Features: Fully adjustable latch to fit all standard door preparations 2-3/8 2-3/4 Backseats. As a bonus, most items ship for free. This technology allows you to re-key your lock in seconds with 3 simple steps and features stainless steel racks, pins, side locking bar for increased strength security. Lifetime mechanical and finish warranty.

Kwikset 660-S 660 Series Deadbolt Single Cylinder with Smartkey. Keyed Entry Single Cylinder Function: This single cylinder deadbolt is keyed on the exterior with an associated thumb turn inside that can quickly and easily lock or unlock latch mechanism. Patented side locking bar technology offers improved security by protecting against lock bumping, an attack technique used to defeat conventional pin tumbler locks. Specifications: Backseat: Adjustable for 2-3/8 or 2-3/4.

Single cylinder locks are most commonly used to secure entrances a residence or place of business.

part #: 6603sstrkp prices

• $23.64-$59.82

specifications locsedoo:

• brand: Kwikset
• mpn: 660-3s.strkp
• model: 660-s
• type: Door Hardware
• color: Brass
• item height: 3 In
• item width: In
• features: Kwikset 660-s 660 Series Deadbolt Single Cylinder
• california prop 65 warning: No
• collection: 660-series
• upc: 199394010327

seller locsedoo:

• city: Waterloo, Iowa
• # reviews: 149110
• rating: 99.4%

returns locsedoo:

• policy: Returns Accepted
• time: 30 Days
• method: Money back
• paid by: Buyer

general locsedoo:

• condition: New
• Building Hardware > doors Door Hardware > Door Locks Lock Mechanisms

shipping locsedoo:

• class: Standard
• transit: 4-6 Days
• type: Fixed
• cost: $0.00
• service: Standard

payments locsedoo:

• other
• credit card: Diners-club
• wallet: Google-pay

offer locsedoo:

• options: Ship-to-home
• sold: 0
• started: April 26, 2026
• quantity: 20
• availability: In Stock

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