--- product_id: 101526803 title: "Prime-Line MP9457 Lock and Door Reinforcer, Stainless Steel, Natural Finish (Single Pack)" brand: "prime-line" price: "$36.87" currency: USD in_stock: true reviews_count: 13 category: "Prime Line" url: https://www.desertcart.us/products/101526803-prime-line-mp9457-lock-and-door-reinforcer-stainless-steel-natural store_origin: US region: United States of America --- # Fits 1-3/4 inch thick doors Stainless steel durability Pre-punched for easy install Prime-Line MP9457 Lock and Door Reinforcer, Stainless Steel, Natural Finish (Single Pack) **Brand:** prime-line **Price:** $36.87 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in peace of mind with Prime-Line’s sleek steel shield! ## Quick Answers - **What is this?** Prime-Line MP9457 Lock and Door Reinforcer, Stainless Steel, Natural Finish (Single Pack) by prime-line - **How much does it cost?** $36.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/101526803-prime-line-mp9457-lock-and-door-reinforcer-stainless-steel-natural) ## Best For - prime-line enthusiasts ## Why This Product - Trusted prime-line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Upgrade:** Pre-punched mounting holes and included hardware make installation a breeze—no extra trips to the hardware store. - • **Sleek, Natural Finish:** Matte stainless steel finish blends effortlessly with any door style, adding subtle security without sacrificing aesthetics. - • **Trusted by Homeowners:** Highly rated with 4.4 stars and praised for durability and quick delivery—join the savvy crowd securing their homes. - • **Fortify Your Entry Point:** Reinforces the door’s weakest spot to prevent forced entry with robust stainless steel strength. - • **Universal Fit for Modern Doors:** Designed for standard 1-3/4 inch thick doors with key-in knob locksets, ensuring seamless compatibility. ## Overview The Prime-Line MP9457 Lock and Door Reinforcer is a stainless steel security upgrade designed to strengthen the vulnerable area around your door lock. Engineered for 1-3/4 inch thick doors with key-in knob locksets, it features a natural matte finish and pre-punched holes for quick installation. This durable reinforcer prevents forced entry, combining functionality with a clean, classic look favored by professionals and homeowners alike. ## Description The Defender Security MP9457 Stainless Steel Lock and Door Reinforcer assists in preventing forced entry by reinforcing the weak spot of an entry door. It can be used to reinforce and repair both metal and wood doors. Stainless steel construction, the lock reinforcer plate comes in a natural finish. All the necessary mounting hardware is included for a quick and easy installation. The lock reinforcement plate is pre-punched for mounting. The reinforcer is designed for 1-3/4 inch thick doors that have mortise or drive-in latches. Measuring 3-7/8 inch wide by 9 inch tall, the reinforcement plate accommodates key-in knob locksets on doors that have 2-1/8 inch bore sizes, 3-5/8 inch on center from each other with a backset of 2-3/8 inch. The door reinforcer is non-recessed. Review: Works Great - We painted ours to match our door knob and it was perfect. Just make sure your measurements are right. Good product and we received it quickly! Review: Smart product - Solved my problem. Previously, someone butchered the door to the point I couldn't put a deadbolt on. This works perfect and is very strong. Looks good too. ## Features - ADDED SECURITY – Prevent forced entry by reinforcing the weak spot of an entry door with the non-recessed door lock reinforcer; use to reinforce and repair both metal and wood doors - BUILT TO LAST – Made of stainless steel, the door lock reinforcement plate comes in a natrual finish - EASY INSTALLATION – All the necessary mounting hardware is included with the lock reinforcement plate for a quick and easy installation; the door reinforcer plate is pre-punched for mounting - DIMENSIONS – The door lock reinforcement plate is designed for 1-3/4 inch thick doors; it measures 3-7/8 inch wide by 4-1/2 inch tall; it accommodates key-in knob locksets on doors that have 2-1/8 inch bore sizes, with a backset of 2-3/8 inch - NOTE - Please refer to the line art drawing for dimensions and compare with your needs before ordering ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B077959TXR | | Additional Features | Easy to Install | | Best Sellers Rank | #348,779 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,429 in Door Lock Replacement Parts | | Brand | PRIME-LINE | | Brand Name | PRIME-LINE | | Center To Center Spacing | 3.63 Inches | | Color | Stainless Steel | | Customer Reviews | 4.4 out of 5 stars 139 Reviews | | Exterior Finish | Stainless Steel | | Finish Types | Matte | | Global Trade Identification Number | 00049793494573 | | Handle Attachment Mechanism | bolt | | Handle Material | Stainless Steel | | Handle Type | Knob | | Included Components | Door Guard Plate | | Item Depth | 1/8 inch | | Item Dimensions L x W | 4.31"L x 1.75"W | | Item Type Name | Door lock reinforcer | | Item Weight | 150 Grams | | Lock Type | Key Lock | | Manufacturer | Prime-Line | | Manufacturer Part Number | MP9457 | | Material | Stainless Steel | | Material Type | Stainless Steel | | Metal Type | Stainless Steel | | Model Number | MP9457 | | Number of Items | 1 | | Product Dimensions | 4.31"L x 1.75"W | | Shape | Rectangular | | Style | Classic | | Style Name | Classic | | UPC | 049793494573 | | Unit Count | 1.0 Count | ## Images ![Prime-Line MP9457 Lock and Door Reinforcer, Stainless Steel, Natural Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/51QXgtZqz2L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works Great *by D***R on June 30, 2023* We painted ours to match our door knob and it was perfect. Just make sure your measurements are right. Good product and we received it quickly! ### ⭐⭐⭐⭐⭐ Smart product *by B***N on April 20, 2021* Solved my problem. Previously, someone butchered the door to the point I couldn't put a deadbolt on. This works perfect and is very strong. Looks good too. ### ⭐⭐⭐⭐ Okay for what it is *by B***D on July 7, 2023* Not the best, not the worst, just remember to MEASURE your openings before purchasing --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/101526803-prime-line-mp9457-lock-and-door-reinforcer-stainless-steel-natural](https://www.desertcart.us/products/101526803-prime-line-mp9457-lock-and-door-reinforcer-stainless-steel-natural) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*