---
product_id: 561555508
title: "QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool"
brand: "qisf"
price: "1679460₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/561555508-qisf-300mm-long-bit-holder-1-4-inch-hex-shank
store_origin: VN
region: Vietnam
---

# 300mm/12in length for deep reach Self-locking quick release mechanism 1/4 inch hex shank fits multiple tools QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool

**Brand:** qisf
**Price:** 1679460₫
**Availability:** ✅ In Stock

## Summary

> 🔧 Unlock precision and speed with every twist!

## Quick Answers

- **What is this?** QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool by qisf
- **How much does it cost?** 1679460₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/561555508-qisf-300mm-long-bit-holder-1-4-inch-hex-shank)

## Best For

- qisf enthusiasts

## Why This Product

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

## Key Features

- • **One-Handed Speed:** Quick-release locking lets you swap bits in under a second—boost your workflow.
- • **Extended Reach Mastery:** 12-inch length conquers tight, hard-to-access spaces effortlessly.
- • **Effortless Self-Locking:** Backward locking device ensures secure bit hold and instant pop-up release.
- • **Universal Compatibility:** Seamlessly fits nut drivers, electric & pneumatic screwdrivers, and drills.
- • **Durable Alloy Steel Build:** Polished finish and rugged material designed for long-lasting professional use.

## Overview

The QISF 300mm Long Bit Holder is a polished alloy steel extension designed for professionals needing superior access in tight spaces. Featuring a 1/4 inch hex shank and a self-locking quick-release mechanism, it enables fast, secure bit changes compatible with a wide range of screwdrivers and drills. Ideal for DIY, maintenance, and repair tasks, this 12-inch extender boosts efficiency and precision on every job.

## Description

300mm/ 12 inch in length, Flexibly used in the situation of narrow space for superior access for hard-to-reach fasteners.

## Features

- Feature - 300mm/ 12 inch in length, Flexibly used in the situation of narrow space for superior access for hard-to-reach fasteners.
- Self-locking - Interface has a locking mechanism（non-magnetic），Equipped with a backward locking device that is inserted into the batch head to release the automatic locking device, make it easy to pop up batch head automatically, fast and quick release ensured and greatly improve work efficiency.
- Widely Used - Suitable for nut, batch head, pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and screwdriver head conversion uses; They are also ideal for DIY work, household maintece, and most general repairs.
- Quick Release - Interface has a locking mechanism for one-handed quick release. Press down can release the ejection bit, realizing quick replacement in one second.
- Note - This long bit holder Only suitable for Single Head Hex Shank Drill Bits, NOT suitable for double head drill bits!.Package - 1 X 12 inch screwdriver bit holders

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | QISF |
| Part number | 300mm Bit Holder |
| Item Weight | 180 g |
| Package Dimensions | 31.5 x 5.6 x 1.5 cm; 180 g |
| Item model number | bit holder |
| Size | 1/4 inches |
| Finish | Polished |
| Material | Alloy Steel |
| Power source type | hand_powered |
| Number Of Pieces | 1 |
| Compatible Fastener Range | 0.25 inches |
| Included components | Holder |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** QISF
- **Item length:** 300 Millimeters
- **Material:** Alloy Steel
- **Finish type:** Polished
- **Number of pieces:** 1

## Images

![QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool - Image 1](https://m.media-amazon.com/images/I/51lTtVzfRQL.jpg)
![QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool - Image 2](https://m.media-amazon.com/images/I/61jvRIPEVCL.jpg)
![QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool - Image 3](https://m.media-amazon.com/images/I/51nvEt2YWSL.jpg)
![QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool - Image 4](https://m.media-amazon.com/images/I/61mtPLlwQWL.jpg)
![QISF 300mm Long Bit Holder, 1/4 Inch Hex Shank Quick Release Bar Socket Screwdriver Bit Extender Holder, Self-Locking Extension Drill Chuck Adapter Conversion Tool - Image 5](https://m.media-amazon.com/images/I/61GbHz9klfL.jpg)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-23*