SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security
SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security

SENY Door Knob & Deadbolt Reinforcement Plate – Heavy Duty Lock Reinforcer for Door Repair & Security

$29.99
Reinforcement plate enhances door strength and stability, offering quiet confidence in every touch and lasting protection in every detail.
  • Strengthens damaged or weakened door areas
  • Heavy-duty reinforcement improves door security
  • Available in single-hole, double-hole, or no-hole options
  • Essential upgrade for home safety and peace of mind
Color:Matte Black
Function:No-Hole
Size:Height 4-1/2" + Width 4-5/16" + Door Thickness 35mm

🚚 Free Shipping on $99+ (Standard $4.99 under $99)
⚡ Expedited Shipping Available
🔁 30-Day Returns
🛡 2-Year Warranty
💳 Visa · Mastercard · Amex · Apple Pay · Google Pay · Shop Pay · Paypal
💰 Taxes included — no hidden fees.

No APO/FPO/PO Boxes. Expedited shipping is not available for remote areas.

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.                                                                                         

Select your function

Trusted by homeowners nationwide.

Over 10,000 Sets Sold in the U.S.

Strengthen, Repair & Protect Your Door

The SENY Door Reinforcement Plate is designed to restore structural integrity and enhance security around door knob and deadbolt areas. Ideal for repairing damaged doors or reinforcing high-stress points, it delivers dependable strength with a clean, professional finish.

Heavy-Duty Metal Construction

Crafted from high-quality metal, this reinforcement plate provides excellent durability and resistance to wear. It helps prevent door cracking, splitting, or further damage caused by repeated use or forced entry attempts.

Versatile Installation Options

Available in multiple configurations to suit different door conditions and repair needs:

  • No-Hole Plate – Ideal for covering damaged areas or reinforcing weak spots

  • Single-Hole Plate – Designed for standard door knob openings

  • Extended Single-Hole Plate – Provides additional vertical coverage for heavily damaged doors

This flexibility allows precise reinforcement across a wide range of door styles and repair scenarios.

Compatible with Standard Residential Doors

Designed to work with common residential door preparations and materials, including:

  • Wood doors

  • Metal doors

Suitable for reinforcing both interior and exterior doors.

Multiple Finish Options

Available in a variety of finishes to coordinate seamlessly with existing door hardware and décor styles.

Dimensions & Specifications

No-Hole Plate

  • Height: 4-1/2"

  • Width: 4-5/16"

  • Thickness: 1-3/8"

Single-Hole Plate

  • Height: 4-1/2"

  • Width: 3-7/8"

  • Thickness: 1-3/8"

  • Hole Diameter: 2-1/8"

Extended Single-Hole Plate

  • Height: 9"

  • Width: 3-7/8"

  • Thickness: 1-3/8"

  • Hole Diameter: 2-1/8"

Ideal for Door Repair & Security Upgrades

Perfect for:

  • Reinforcing damaged door knob or deadbolt areas

  • Repairing worn or broken doors

  • Increasing resistance to forced entry

  • Restoring door appearance after hardware replacement

Warranty & Important Notes

  • Includes a 2-year warranty

  • California Proposition 65 Warning: Cancer and Reproductive Harm – www.p65warnings.ca.gov

  • Due to production batch variations, slight color differences may occur
No Hole： HEIGHT:4-1/2'' WIDTH:4-5/16'' THICKNESS:1-3/4''
Single Short Hole：HEIGHT:4-1/2'' WIDTH:3-7/8'' THICKNESS:1-3/8'' DIAMETER:2-1/8''
Single Long Hole：HEIGHT:9'' WIDTH:3-7/8'' THICKNESS:1-3/8'' DIAMETER:2-1/8''
Double Holes：HEIGHT:10-7/8'' WIDTH:3-7/8'' THICKNESS:1-3/4'' DIAMETER:2-1/8'' CENTER TO CENTER:5-1/2''