single cylinder deadbolt lock
SENY Round Single Cylinder Keyed Entry Deadbolt Lock for Interior & Exterior Doors
SENY Round Single Cylinder Keyed Entry Deadbolt Lock for Interior & Exterior Doors
SENY Round Single Cylinder Keyed Entry Deadbolt Lock for Interior & Exterior Doors
SENY Round Single Cylinder Keyed Entry Deadbolt Lock for Interior & Exterior Doors
SENY Round Single Cylinder Keyed Entry Deadbolt Lock for Interior & Exterior Doors
deadbolt door knob
door knobs and deadbolts
deadbolt lock with key on both sides
black deadbolt lock
single deadbolt lock
schlage primus deadbolt

SENY Round Single Cylinder Keyed Entry Deadbolt Lock for Interior & Exterior Doors

$45.99
The single-cylinder deadbolt features quality components for smooth, durable performance.
  • Fits most standard U.S. doors
  • Designed for daily use, easy DIY install
  • Adjustable backset: 2-3/8" or 2-3/4"
  • Bolt Throw: 1" hardened steel
Finish:Satin Nickel

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FAQ

  1. Can Seny hardware be customized for DIY projects?
    We offer personalized engraving services for DIY enthusiasts, making every door handle truly one of a kind and connecting the warmth of home with a personal touch.
  2. What finishes are available for door hardware?                                                        Seny Hardware offers a wide range of finishes, including Matte Black, Brushed Copper, Faux Gold, Brushed Red Bronze, Highlighted Red Bronze, Brushed Nickel, Polished Chrome, Antique Brass, Aged Brass, and Champagne Bronze — crafted to elevate any interior.
  3. Is Seny Hardware suitable for the exterior of my house?                                        Yes, our door handles and pulls are protected with a powder-coated anti-corrosion finish and have undergone rigorous quality testing for residential use. In addition, all of our hardware is thoroughly tested for quality before shipping.               
  4. How quickly can I get my order?                                                                               
    Most orders ship within 1–2 business days, and transit time varies by location—typically 2–7 days (Standard) or 1–2 days (Expedited). You’ll receive a tracking number once your package ships!
  5. Do your mortise locksets include keys?      
    Yes, the package contains one deadbolt, strike plate, latch, and two skeleton keys.
  6. What is the backset of your mortise lock?                                                                2.36"– We do not offer any other size.
  7. Will your interior mortise lock chassis fit all older doors with mortise locks?      Compatible with most interior doors and can adapt 2.36"backset.
  8. Are crystal door knobs hard to use in winter because they feel cold?                   While crystal naturally feels cooler to the touch during winter, they will warm up quickly with use.Many customers choose them because they not only function perfectly as hardware but also add a unique decorative accent that elevates the entire space.
  9. What do I do if someone locks themselves in a room?                                            There is a small hole in the Rosette or Plate on the exterior side of the door that can be used to unlock a “locked” privacy door. Insert a straightened paper clip or something of similar size into the privacy hole and gently push to unlock the privacy.

  10. Do the screw holes match?                                                                                         Generally, our screw holes and locks are designed to be compatible. If you encounter any mismatch issues, please take a photo and contact our after-sales customer service for help.                                                                                         

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Fast U.S. Shipping

Ships from the U.S. with fast, reliable delivery. Most orders ship within 1–2 business days.

Reliable Security with Classic Round Design

The SENY Round Single Cylinder Keyed Entry Deadbolt is designed to deliver dependable security with a clean, timeless round profile. Suitable for both interior and exterior doors, this deadbolt combines solid construction with smooth, reliable performance for everyday residential use.

Single Cylinder Keyed Entry Function

Featuring a keyed exterior cylinder and an interior thumb turn, this single cylinder deadbolt provides secure locking from the outside while allowing quick and convenient unlocking from inside.

Precision-Engineered Performance

Built with high-quality internal components, the deadbolt ensures smooth latch engagement and consistent locking operation every time.

Solid Construction for Long-Lasting Durability

Crafted from solid materials, this round deadbolt offers enhanced strength, resistance to wear, and long-term durability for daily use on residential doors.

Complete Deadbolt Set for One Door

Includes a complete deadbolt set for one door, with pre-assembled deadbolt components (key cylinder and thumb turn) to simplify installation and ensure proper alignment.

Multiple Finish Options

Available in a variety of finishes to coordinate seamlessly with different door styles and home décor.

Standard-Compatible Design

  • Adjustable backset: 2-3/8" or 2-3/4"

  • Fits standard U.S. door thicknesses from 1.38"–1.75"
    Designed for easy replacement or new installations.

Ideal for Interior & Exterior Doors

Perfect for:

  • Front and back doors

  • Interior doors requiring added security

  • Residential entry applications

Built for Everyday Security

Engineered for smooth daily operation and backed by a 2-year warranty, offering confidence and peace of mind.

Important Notes

  • Due to production batch variations, slight color differences may occur

  • California Proposition 65 Warning
    Cancer and Reproductive Harm — www.P65Warnings.ca.gov