--- product_id: 15935923 title: "Prime-Line U 9553 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack)" brand: "defender security" price: "¥4971" currency: JPY in_stock: true reviews_count: 13 url: https://www.desertcart.jp/products/15935923-prime-line-u-9553-stainless-steel-lock-and-door-reinforcement store_origin: JP region: Japan --- # Reinforces door lock weak spots Fits 1-3/4 inch thick doors Includes all mounting hardware Prime-Line U 9553 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) **Brand:** defender security **Price:** ¥4971 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in peace of mind with sleek, stainless steel security. ## Quick Answers - **What is this?** Prime-Line U 9553 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) by defender security - **How much does it cost?** ¥4971 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/15935923-prime-line-u-9553-stainless-steel-lock-and-door-reinforcement) ## Best For - defender security enthusiasts ## Why This Product - Trusted defender security brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Setup:** Comes with pre-punched holes and all necessary fasteners for quick, hassle-free installation. - • **Trusted Durability:** Crafted from premium stainless steel to resist wear, corrosion, and tampering. - • **Seamless Integration:** Flush installation with recessed latch plate pocket for a sleek, modern look. - • **Fortify Your Entry Point:** Recessed stainless steel plate prevents forced entry with unmatched durability. - • **Universal Fit for Security:** Designed for 1-3/4 inch thick doors with standard 2-1/8 inch bore and 2-3/8 inch backset. ## Overview The Prime-Line U 9553 Stainless Steel Lock and Door Reinforcement Plate is engineered to strengthen the most vulnerable part of your entry door. Crafted from durable stainless steel, it fits standard 1-3/4 inch thick doors with a 2-1/8 inch bore and 2-3/8 inch backset. Featuring a recessed latch plate pocket for flush mounting, it includes all necessary hardware for easy installation on both metal and wood doors. This single-pack reinforcement plate offers a modern finish and reliable protection against forced entry, making it an essential upgrade for enhanced home or office security. ## Description Prime-Line U 9553 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) ## Features - ADDED SECURITY – Prevent forced entry by reinforcing the weak spot of an entry door with the recessed door lock reinforcer; use to reinforce and repair both metal and wood doors - BUILT TO LAST – Made of stainless steel construction, the door lock reinforcement plate comes in a stainless steel finish to fit over a single bore hole on your door - 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 features one 2-1/8 inch bore with a 2-3/8 inch backset - NOTE - Please refer to the line art drawing for dimensions and compare to your needs before purchasing (Not Universal) ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Prime-Line Products | | Part Number | U 9553 | | Item Weight | 5.9 ounces | | Product Dimensions | 3.88 x 1.38 x 4.5 inches | | Item model number | U 9553 | | Is Discontinued By Manufacturer | No | | Size | 1 Count (Pack of 1) | | Color | Stainless Steel | | Style | Modern | | Finish | Stainless Steel | | Material | Steel | | Item Package Quantity | 1 | | Number Of Pieces | 1 | | Mounting Type | Door Mount | | Included Components | Lock and Door Reinforcer | | Batteries Included? | No | | Batteries Required? | No | | Warranty Description | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. | ## Images ![Prime-Line U 9553 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/61gzLCYSYfL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Works great for my door *by J***N on Reviewed in the United States on August 9, 2023* Works great for my door. ### ⭐⭐⭐⭐ 4.0 out of 5 stars Great Security Addition to any home. *by M***N on Reviewed in the United States on December 9, 2020* Easy to install and offers a Great level of security. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars This works for a damaged door *by R***M on Reviewed in the United States on June 30, 2022* The original door lock installation was slightly off center, so when we tried use a rectangular jig on the original circle opening, we cut too close to one edge and the wood core crumbled in that spot. This covers the damage and reinforces the door. Luckily, we have a large gap and did not need to cut away on the door anymore to fit the cover snugly on the edge. --- ## 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.jp/products/15935923-prime-line-u-9553-stainless-steel-lock-and-door-reinforcement](https://www.desertcart.jp/products/15935923-prime-line-u-9553-stainless-steel-lock-and-door-reinforcement) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-31*