---
product_id: 17422420
title: "Prime-Line S 4180 Door Knob Lock-Out Device, Gray, Single Pack"
brand: "prime-line"
price: "R530"
currency: ZAR
in_stock: true
category: "Prime Line"
url: https://www.desertcart.co.za/products/17422420-prime-line-s-4180-door-knob-lock-out-device-gray
store_origin: ZA
region: South Africa
---

# Fits knobs ≤ 2.44 inch Blocks keyhole access Durable diecast metal Prime-Line S 4180 Door Knob Lock-Out Device, Gray, Single Pack

**Brand:** prime-line
**Price:** R530
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock out the unwanted, lock in peace of mind.

## Quick Answers

- **What is this?** Prime-Line S 4180 Door Knob Lock-Out Device, Gray, Single Pack by prime-line
- **How much does it cost?** R530 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/17422420-prime-line-s-4180-door-knob-lock-out-device-gray)

## 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

- • **Built to Last:** Crafted from weather-resistant diecast metal for reliable, long-term security.
- • **Precision Fit:** Designed for rounded knobs up to 2-7/16 inches in diameter—perfect for most standard doors.
- • **Keyhole Fortress:** Seamlessly covers your doorknob’s keyhole to deny unauthorized key access.
- • **Quick Clean Access:** Removable cylinder with O-ring allows easy cleaning without compromising security.
- • **Versatile Security:** Ideal for rentals, evictions, job sites, and office storage—lock out unwanted keyholders instantly.

## Overview

The Prime-Line S 4180 Door Knob Lock-Out Device is a robust, weather-resistant security solution that fits rounded doorknobs up to 2.44 inches in diameter. It blocks access to the keyhole only, preventing unauthorized unlocking without replacing your entire lock system. Featuring a durable diecast metal cylinder secured by an O-ring, it offers easy maintenance and versatile use in homes, rentals, offices, and job sites.

## Description

This Defender Security doorknob lock-out device is designed to be mounted directly over the entry doorknob to prevent access to the keyhole only, effectively preventing unauthorized access by key. The durable, diecast cylinder is held in place with a removable O-ring for cleaning the cylinder when the lock-out device is unlocked and open. The cylinder cannot be removed when the device is closed and locked. This lock-out device is often used in evictions, rentals, home sales, on job sites, in-home, on in-office storage room knobs to keep other keyholders out, even if they have a key to the door. It is a quicker and easier solution than replacing the entire knob and lock system on a door while still getting the protection you need. The maximum outside diameter of a round knob that can be secured with this device is 2-7/16 inch.

## Features

- DOORKNOB LOCK-OUT DEVICE: The Defender Security doorknob lock-out device can be placed directly over the entry doorknob to block access to the keyhole. Note: Measure your door's handle diameter to ensure it will fit inside the lock-out device
- COVERS KEYHOLE: This doorknob security device is designed to keep the keyhole on the locked entry doorknob from being accessed, not the handle from being turned, effectively keeping other keyholders out
- REMOVABLE CYLINDER: The durable diecast cylinder is held in place with an O-ring and is removable for cleaning when the device is unlocked and open. The cylinder cannot be removed when the device is closed and locked
- DIMENSIONS: This lock-out device can protect rounded doorknobs that have a max diameter of 2-7/16 inch. Note that the shaft cut-out is circular in shape and measures 1-3/16 inch, so it may fit loosely over doorknobs with smaller diameter slender shafts
- APPLICATIONS: This lock-out device is often used in evictions, rentals, home sales, on job sites, in-home, in-office storage knobs and more. It is used in situations where you want to prevent other keyholders from accessing the keyhole to unlock
- KEYS LOCATION: Look for the keys inside the lock-out device as they may shift around during transportation and packaging

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BOZBDK6 |
| Additional Features | Weather Resistant |
| Best Sellers Rank | #3,221 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Lockout & Tagout Devices |
| Brand Name | PRIME-LINE |
| Color | Gray |
| Customer Package Type | 1 |
| Customer Reviews | 4.2 4.2 out of 5 stars (3,529) |
| Exterior Finish | Gray |
| Finish Types | Gray |
| Global Trade Identification Number | 00049793041807 |
| Hand Orientation | Right |
| Handle Attachment Mechanism | Snap-on/Press-fit |
| Handle Compatibility | Size Specific |
| Handle Material | Diecast Metal |
| Handle Type | Knob |
| Included Components | Lock And Key |
| Indoor Outdoor Usage | Indoor |
| Is Weight Bearing | No |
| Item Depth | 3.75 inches |
| Item Dimensions L x W | 2.45"L x 4.2"W |
| Item Type Name | Lock-out device |
| Item Weight | 1.34 Pounds |
| Lock Type | Key Lock |
| Manufacturer | Prime-Line Products (Home Improvement) |
| Manufacturer Part Number | S 4180 |
| Manufacturer Warranty Description | Goods are warranted against manufacturing defects for 1 year. |
| Material Type | Diecast |
| Metal Type | metal_type |
| Model Number | S 4180 |
| Number of Items | 1 |
| Room Type | room |
| Shape | Round |
| Specific Uses For Product | specific_uses_for_product |
| Style Name | Device |
| Theme | Christmas |
| UPC | 049793041807 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** PRIME-LINE
- **Color:** Gray
- **Material:** Diecast
- **Product Dimensions:** 2.45"L x 4.2"W
- **Style:** Device

## Images

![Prime-Line S 4180 Door Knob Lock-Out Device, Gray, Single Pack - Image 1](https://m.media-amazon.com/images/I/61FMFE3dF4L.jpg)

## Available Options

This product comes in different **Color** options.

## Frequently Bought Together

- Prime-Line S 4180 Door Knob Lock-Out Device – Prevents Turning of Door Knob and Access to Keyhole, Can be Used for Home Rentals, Evictions, Job Sites & More – Keyed Alike, Diecast, Gray (Single Pack)
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**Shop now:** [https://www.desertcart.co.za/products/17422420-prime-line-s-4180-door-knob-lock-out-device-gray](https://www.desertcart.co.za/products/17422420-prime-line-s-4180-door-knob-lock-out-device-gray)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-08-09*