---
product_id: 13984698
title: "Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack"
brand: "prime-line"
price: "S$1"
currency: SGD
in_stock: false
url: https://www.desertcart.sg/products/13984698-prime-line-u-9879-step-on-sliding-patio-door-lock
store_origin: SG
region: Singapore
---

# Convenient foot operation Secure locking mechanism Weather resistant design Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack

**Brand:** prime-line
**Price:** S$1
**Availability:** ❌ Out of Stock

## Summary

> Step into security! 👣

## Quick Answers

- **What is this?** Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack by prime-line
- **How much does it cost?** S$1 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/13984698-prime-line-u-9879-step-on-sliding-patio-door-lock)

## 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

- • **Versatile Fit:** Perfect for doors 1-3/8 inch to 1-3/4 inch thick.
- • **Ventilation Option:** Easily lock in a ventilating position for fresh air.
- • **Effortless Security:** Lock your patio door with a simple step!
- • **Sleek Modern Design:** White finish complements any contemporary decor.
- • **Durable Construction:** Diecast housing with hardened steel bolt for ultimate strength.

## Overview

The PRIME-LINEU 9879 White Step-On Sliding Patio Door Lock is designed for doors 1-3/8 inch to 1-3/4 inch thick, featuring a convenient foot operation for effortless locking. Its diecast housing with a white painted finish and hardened steel bolt ensures durability and security, while the weather-resistant design makes it perfect for outdoor use. This lock allows you to secure your door in both closed and ventilating positions, combining functionality with modern aesthetics.

## Description

This is a painted diecast housing with hardened steel bolt. Securely locks door in closed or ventilating position. Features a convenient foot operated design that is easy to install. Painted diecast housing with hardened steel bolt which securely locks door in closed or ventilating position. Use caution when drilling the securing hole on your sliding glass door so you do not cause damage to the glass.

## Features

- Door Thickness Compatibility: Used on doors 1-3/8 inch to 1-3/4 inch thick
- Convenient Foot Operation: Features hands-free foot-operated design for easy locking and unlocking
- Bottom Mount Installation: Used on the bottom of sliding patio doors for secure placement
- Durable Construction: Diecast housing with a white painted finish and hardened steel bolt for long-lasting performance
- Versatile Locking Positions: Securely locks door in a closed or ventilating position for added security and airflow control
- Easy Installation: Simple to install on sliding glass doors with basic tools and hardware included
- Enhanced Security: Hardened steel bolt provides reliable protection against forced entry attempts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BNVR3YQ |
| Best Sellers Rank | #296,295 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,080 in Sliding Door Hardware |
| Color | ['Yellow'] |
| Customer Reviews | 4.1 4.1 out of 5 stars (451) |
| Date First Available | February 22, 2013 |
| Finish | White |
| Included Components | Step-On Sliding Patio Door Lock |
| Item Package Quantity | 1 |
| Item Weight | 2.88 ounces |
| Item model number | U 9879 |
| Manufacturer | Prime-Line Products (Home Improvement) |
| Material | Diecast |
| Number Of Pieces | 1 |
| Part Number | U 9879 |
| Product Dimensions | 0.88 x 0.63 x 2 inches |
| Size | 1 Count (Pack of 1) |
| Special Features | Weather Resistant |
| Style | Modern |
| Usage | specific_uses_for_product |
| Warranty Description | Goods are warranted against manufacturing defects for 1 year. |

## Images

![Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack - Image 1](https://m.media-amazon.com/images/I/615DRFkTQHL.jpg)
![Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack - Image 2](https://m.media-amazon.com/images/I/31hVKaHDGDL.jpg)
![Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack - Image 3](https://m.media-amazon.com/images/I/41UgR7ggaZL.jpg)
![Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack - Image 4](https://m.media-amazon.com/images/I/613k7SkoAPL.jpg)
![Prime-Line U 9879 Step-On Sliding Patio Door Lock, White, Single Pack - Image 5](https://m.media-amazon.com/images/I/31CwVf5xQSL.jpg)

## Available Options

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

## Questions & Answers

**Q: What's the bolt throw?**
A: A heavy duty toggle switch.  Excellent product.

**Q: Does the lever have two states? (open/close) or is it spring based, meaning I have to hold it open in order to slide the door**
A: It is not spring based.  If you push it up it lets you open or close the door, when you push it down it locks into the hole you drill in the door and prevents it from moving.

**Q: Could this be mounted universally, that is a door going left to right or right to left? I would think so but it doesn’t hurt to ask. Thanks**
A: I believe so.  It’s been a few years since I installed this lock, but as I recall it could mount on either side.

**Q: Could this be used on a sliding door that had a dog door installed? Dog door in the tracks next to the door.**
A: That’s what we use it for. To keep the door secure while the dog door is in place.

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**Shop now:** [https://www.desertcart.sg/products/13984698-prime-line-u-9879-step-on-sliding-patio-door-lock](https://www.desertcart.sg/products/13984698-prime-line-u-9879-step-on-sliding-patio-door-lock)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-08-22*