---
product_id: 370384153
title: "Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)"
brand: "sterling"
price: "₩63614"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/370384153-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel-internal
store_origin: KR
region: South Korea
---

# TS007 1* Kitemark Secured by Design Anti-attack features Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)

**Brand:** sterling
**Price:** ₩63614
**Availability:** ✅ In Stock

## Summary

> 🔑 Lock in peace of mind with SterlingInt!

## Quick Answers

- **What is this?** Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) by sterling
- **How much does it cost?** ₩63614 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/370384153-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel-internal)

## Best For

- sterling enthusiasts

## Why This Product

- Trusted sterling brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Design:** Anti-Snap technology keeps your home safe from intruders.
- • **Versatile Fit:** Compatible with timber, composite, UPVC, aluminium, and patio doors.
- • **Unmatched Security:** Secured by Design Approved - Trust the UK Police Initiative.
- • **Top-tier Certification:** TS007 1* Kitemark - Tested to the highest standards.
- • **Comprehensive Protection:** Anti-Pick, Anti-Screw, Anti-Pull, Anti-Bump, and Anti-Drill components.

## Overview

The SterlingInt Ext BS1 ETN4040 Thumbturn Door Cylinder is a high-security locking solution, featuring a satin nickel finish and designed for both internal and external use. With a total length of 90mm, it meets rigorous security standards and is suitable for various door types, ensuring your home remains safe and stylish.

## Description

Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)

## Features

- Secured By Design Approved Product - The Official UK Police Security Initiative. Recommended By The Police & Insurance Companies.
- TS007 1* Kitemark - Tested To The Very Highest Standards By BSi - British Standards Institution
- Anti-Pick, Anti-Screw, Anti-Pull, Anti-Bump and Anti-Drill components designed to resist to known attack methods on door lock cylinders
- Anti-Snap - sacrificial section leaves cylinder intact stopping thieves entering the property
- Suitable for use with a wide range of doors including timber, composite, UPVC, aluminium or patio doors with a Euro profile

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Sterling |
| Special Feature | Key Unlock |
| Lock Type | Key Lock |
| Item dimensions L x W x H | 3.54 x 0.59 x 0.79 inches |
| Material | Aluminum |
| Recommended Uses For Product | Security |
| Style | Internal 40mm External 50mm (90mm Total) |
| Color | Satin Nickel |
| Number of Pieces | 1 |
| Finish Type | satin |
| Included Components | Lock Cylinder, 3 Keys, Fitting Screw |
| Controller Type | Hand Control |
| Shape | Round |
| Model Name | (90mm) TS007 BS1 1 Star Police Approved Secured By Design |
| Manufacturer | Sterling |
| Part Number | BS1 ETN4050 |
| Item Weight | 12 ounces |
| Product Dimensions | 3.54 x 0.59 x 0.79 inches |
| Item model number | 40mm Int 50mm Ext |
| Size | 40mm Internal 50mm External (90mm Total) |
| Finish | satin |
| Item Package Quantity | 1 |
| Special Features | Key Unlock |
| Batteries Required? | No |

## Images

![Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 1](https://m.media-amazon.com/images/I/71ThDmr8TWL.jpg)
![Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 2](https://m.media-amazon.com/images/I/813Mh1nUD5L.jpg)
![Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 3](https://m.media-amazon.com/images/I/81P6PKdMmjL.jpg)
![Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 4](https://m.media-amazon.com/images/I/81Ih20IK19L.jpg)
![Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total) - Image 5](https://m.media-amazon.com/images/I/814+hAxzlTL.jpg)

## Available Options

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

## Frequently Bought Together

- Sterling Int Ext BS1 ETN4040 Thumbturn Door Cylinder, Satin Nickel, Internal 40mm External 50mm (90mm Total)
- Sterling TS007 BS1 1 Star Police Approved Secured by Design Euro Door Cylinder, Satin Nickel, 50mm x 50mm (100mm Total)
- UPVC Door Handles Set - White - Lever/Lever - 92mm PZ (Centres) - 122mm Screw to Screw - Backplate 212mm X 34mm- White Replacement- PVC Door Handle

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**Shop now:** [https://www.desertcart.kr/products/370384153-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel-internal](https://www.desertcart.kr/products/370384153-int-ext-bs1-etn4040-thumbturn-door-cylinder-satin-nickel-internal)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-24*