---
product_id: 13308401
title: "Stanley Proto J7121 1/2\" Square Ext, 7/16\" Hex"
brand: "proto"
price: "8.76 OMR"
currency: OMR
in_stock: true
url: https://www.desertcart.com.om/products/13308401-stanley-proto-j7121-1-2-square-ext-7-16-hex
store_origin: OM
region: Oman
---

# Size stamped for quick ID Ball detent secure fit Forged steel durability Stanley Proto J7121 1/2" Square Ext, 7/16" Hex

**Brand:** proto
**Price:** 8.76 OMR
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your toolkit with precision and power — don’t get left behind!

## Quick Answers

- **What is this?** Stanley Proto J7121 1/2" Square Ext, 7/16" Hex by proto
- **How much does it cost?** 8.76 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/13308401-stanley-proto-j7121-1-2-square-ext-7-16-hex)

## Best For

- proto enthusiasts

## Why This Product

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

## Key Features

- • **Instant Size Recognition:** Size stamped directly on the tool means no more fumbling—grab the right extension every time.
- • **Precision Ball Detent Lock:** Ensures a secure, slip-free connection for confident, efficient work.
- • **Compact & Lightweight Design:** At just 6.25 inches and 2.4 ounces, it’s the perfect balance of portability and power.
- • **Built to Last with Forged Steel:** Engineered for strength and longevity, this extension withstands tough jobs without compromise.
- • **Made in the USA, Trusted Worldwide:** Crafted domestically with superior quality standards for professionals who demand the best.

## Overview

The Stanley Proto J7121 1/2" Square Extension with 7/16" Hex drive is a forged steel, durable tool accessory designed for professional use. Featuring a size stamp for quick identification and a ball detent for secure socket retention, this 6.25-inch extension is lightweight and made in the USA. Ideal for precise, reliable manual applications (not impact), it’s a must-have for any serious toolkit.

## Description

Stanley Proto J7121 1/2" Square Ext, 7/16" Hex

## Features

- Made of forged steel
- Size stamped on tool for easy identification
- Ball detent
- Not for use on impact applications
- Made in USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Proto |
| Item Length | 6.25 Inches |
| Material | Blend |
| Finish Type | Brushed |
| Number of Pieces | 1 |
| Drive Bit Shank Style | Hex with Square Drive |
| UPC | 662679340155 |
| Global Trade Identification Number | 00662679340155 |
| Bit Compatibilities | 1/2", 7/16" |
| Manufacturer | Stanley Proto |
| Part Number | J7121 |
| Item Weight | 2.4 ounces |
| Item model number | J7121 |
| Size | Оnе Расk |
| Color | Multi |
| Style | Classic |
| Finish | Brushed |
| Pattern | Solid |
| Shape | Rectangular |
| Power Source | hand_powered |
| Item Package Quantity | 1 |
| Head Style | Hex |
| Number of Handles | 1 |
| Measurement System | Inch |
| Compatible Fastener Range | 0.5 inches |
| Included Components | 1/2" Square Extension 7/16" Hex |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Manufacturer |

## Product Details

- **Brand:** Proto
- **Item Length:** 6.25 Inches
- **Material:** Blend
- **Finish Type:** Brushed
- **Number of Pieces:** 1

## Images

![Stanley Proto J7121 1/2" Square Ext, 7/16" Hex - Image 1](https://m.media-amazon.com/images/I/51W7WJZu7NL.jpg)

## Frequently Bought Together

- Proto Stanley J7121 1/2-Inch Square Extension, 7/16-Inch Hex
- Rauckman Utility Product Impact Adapter - 1/2" Square Extension, 7/16" Hex Size - For 1/2" Drive Impact Sockets & Socket Sets - Built Tough With High Strength Alloy Steel
- FJZLQYFFS 7/16 Hex to 1/2 Square Socket Adapter Drive Converter Spring Ball Retainer

---

## 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.com.om/products/13308401-stanley-proto-j7121-1-2-square-ext-7-16-hex](https://www.desertcart.com.om/products/13308401-stanley-proto-j7121-1-2-square-ext-7-16-hex)

---

*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-26*