---
product_id: 493476743
title: "WORKPRO 9 PCS Impact Driver Extension Bar Set, 1/4\", 3/8\" and 1/2\" Drive Socket Extension, Premium Chrome Vanadium Steel with Black Phosphate Finish, Storage Tray Included"
brand: "workpro"
price: "¥10212"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/493476743-workpro-9-pcs-impact-driver-extension-bar-set-1-4
store_origin: JP
region: Japan
---

# Secure spring-loaded detent lock Chrome Vanadium steel durability 9 precision extension bars WORKPRO 9 PCS Impact Driver Extension Bar Set, 1/4", 3/8" and 1/2" Drive Socket Extension, Premium Chrome Vanadium Steel with Black Phosphate Finish, Storage Tray Included

**Brand:** workpro
**Price:** ¥10212
**Availability:** ✅ In Stock

## Summary

> 🔧 Unlock precision and power with every turn — don’t get left behind!

## Quick Answers

- **What is this?** WORKPRO 9 PCS Impact Driver Extension Bar Set, 1/4", 3/8" and 1/2" Drive Socket Extension, Premium Chrome Vanadium Steel with Black Phosphate Finish, Storage Tray Included by workpro
- **How much does it cost?** ¥10212 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/493476743-workpro-9-pcs-impact-driver-extension-bar-set-1-4)

## Best For

- workpro enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Premium chrome vanadium steel with corrosion-resistant black phosphate finish
- • **Organized & Ready:** Includes a sleek storage tray to keep your workspace sharp and efficient
- • **Secure Socket Lock:** Spring-loaded detent ball prevents socket drops during intense work
- • **Versatile 9-Piece Set:** Covers 1/4", 3/8", and 1/2" drives for every project size
- • **Effortless Identification:** Laser-etched size markings for quick, low-light readability

## Overview

The WORKPRO 9 PCS Impact Driver Extension Bar Set offers a comprehensive range of 9 extension bars in 1/4", 3/8", and 1/2" drives, crafted from premium chrome vanadium steel with a corrosion-resistant black phosphate finish. Designed for durability and secure socket retention via a spring-loaded detent ball system, this set is perfect for professional-grade auto repair and DIY projects. Laser-etched size markings ensure easy identification, and the included storage tray keeps your tools organized and ready for action.

## Description

WORKPRO 9 PCS Impact Driver Extension Bar Set, 1/4", 3/8" and 1/2" Drive Socket Extension, Premium Chrome Vanadium Steel with Black Phosphate Finish, Storage Tray Included

## Features

- Set Includes: This premium 9 PCS impact extension bar set includes the following: 2-inch, 4-inch and 6-inch 1/4-inch drive extensions, 3-inch, 6-inch and 10-inch 3/8-inch drive extensions, and 3-inch, 5-inch and 10-inch 1/2-inch drive extensions. This set also comes with a high quality storage tray perfect for your tool box or bench
- Wide Application: This high-quality accessory socket kit can help you play a role in auto repair and other projects. Safe for use with all cordless, electric and pneumatic impact wrenches. You can use it to access deep screw holes
- Prevents Dropping: The spring-loaded detent ball system at the end of bars locks socket into place for security and prevents dropping while the through-hole in the drive end will ensure that your extension bars are securely locked onto the drive
- High-quality Materials: The impact extension bar set is made of high-quality chrome-vanadium steel alloy with a corrosion-resistant black phosphate coating for durability. These extension bars feature a corrosion-resistant mirror chrome finish for easy cleanup
- Clearly Size: The high-contrast size marking of the extension bar is permanently laser etched, making it easy to read even in low-light conditions. In addition, the anti-rust oil on the surface of the product is a normal phenomenon

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ‎‎Hang Zhou Great Star Industrial Co.,LTD |
| Part number | W074518 |
| Item Weight | 1.4 Kilograms |
| Package Dimensions | 34.7 x 12.9 x 3.9 cm; 1.4 kg |
| Item model number | W074518 |
| Size | 9 PCS |
| Color | Black |
| Style | 9 PCS |
| Finish | Polished |
| Material | Chrome Vanadium Steel Alloy Steel |
| Item Package Quantity | 1 |
| Number Of Pieces | 9 |
| Head Style | Fixed Square |
| Compatible Fastener Range | compatible with various drive bits including 1/4-inch, 3/8-inch, and 1/2-inch drive sockets |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** WORKPRO
- **Item length:** 10 Inches
- **Material:** Chrome Vanadium Steel Alloy Steel
- **Finish type:** Polished
- **Number of pieces:** 9

## Images

![WORKPRO 9 PCS Impact Driver Extension Bar Set, 1/4", 3/8" and 1/2" Drive Socket Extension, Premium Chrome Vanadium Steel with Black Phosphate Finish, Storage Tray Included - Image 1](https://m.media-amazon.com/images/I/61Jns5s36SL.jpg)

## Frequently Bought Together

- WORKPRO 9 PCS Impact Driver Extension Bar Set, 1/4", 3/8" and 1/2" Drive Socket Extension, Premium Chrome Vanadium Steel with Black Phosphate Finish, Storage Tray Included
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**Shop now:** [https://www.desertcart.jp/products/493476743-workpro-9-pcs-impact-driver-extension-bar-set-1-4](https://www.desertcart.jp/products/493476743-workpro-9-pcs-impact-driver-extension-bar-set-1-4)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-18*