---
product_id: 32137183
title: "IRWIN Magnetic Bit Holder, 3/8-Inch (4935071)"
brand: "irwin"
price: "NT$12"
currency: TWD
in_stock: false
reviews_count: 10
url: https://www.desertcart.tw/products/32137183-irwin-magnetic-bit-holder-3-8-inch-4935071
store_origin: TW
region: Taiwan
---

# 3/8-inch square drive fit Strong magnetic grip Durable high-quality steel IRWIN Magnetic Bit Holder, 3/8-Inch (4935071)

**Brand:** irwin
**Price:** NT$12
**Availability:** ❌ Out of Stock

## Summary

> 🧲 Lock in your workflow with IRWIN’s magnetic bit holder — never lose your edge!

## Quick Answers

- **What is this?** IRWIN Magnetic Bit Holder, 3/8-Inch (4935071) by irwin
- **How much does it cost?** NT$12 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/32137183-irwin-magnetic-bit-holder-3-8-inch-4935071)

## Best For

- irwin enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from premium materials for long-lasting durability and reliable performance.
- • **Precision Fit:** 3/8-inch square drive ensures seamless compatibility with socket wrenches and adapters.
- • **Magnetic Mastery:** Securely holds bits in place to prevent slips and drops during intense projects.
- • **Lightweight & Compact:** Ultra-light 0.01 oz design fits effortlessly in your toolkit without weighing you down.
- • **Versatile Compatibility:** Works flawlessly with a wide range of drill bits and power tool accessories.

## Overview

The IRWIN Magnetic Bit Holder (3/8-inch) is a precision-engineered tool accessory designed for socket wrenches and adapters. Featuring a strong magnetic grip and durable high-quality steel construction, it offers secure bit retention and long-lasting performance. Lightweight and compact, it enhances your toolkit’s efficiency without adding bulk.

## Description

These IRWIN 3/8-inch Square Drive Insert Bit Holders are available with or without magnet and C-ring. They are designed for use with socket wrenches and adapters.

Review: Great find on here - Great find on here, nice adapter that was hard to find in stores, exactly what I needed. I've got the 20v DeWalt 3/8 impact and wanted a single adapter for drill bit heads, instead of 2 or 3 piece one I was using, worked perfect and yes, magnetic as described.
Review: Fantastic! I wish I had known this little tool existed. I could have used this years ago. - Three things I want to say about this little bit holder: 1) Just to be clear, this is little tool has a hole on each end. On one end there is a hole (the hole you can't see in the photo) which is a square 3/8 inch hole designed to be snapped on to a 3/8 inch socket wrench, just like you would any socket. On the other end there is a hole (the one you CAN see in the photo). That end is designed to hold those little screwdriver type bits (like torx bits, phillips, whatever) that you would typically use in an electric drill, or an electric screwdriver. Why would you want this? Well, basically it enables you to use your socket wrench like a ratcheting screwdriver in places where a typical screwdriver is too long to work. This enables you to use your socket wrench like a right angled ratcheting screwdriver. 2) Notice that hole on the side of the bit holder. Many socket wrenches have a "quick release" feature that does two things. First, it holds your socket in place so it won't fall off. It would be tough to even pull it off if you tried, and you don't want the socket pulling off when you're working with it. Second, it allows you to take the socket off the wrench by pushing a button on the back of the wrench. It will literally fall off in your hand. In order for that quick release feature to be used with this item, you will need to line up that hole on the side with the little protrusion on the socket wrench. Many (most) sockets are designed so the quick release will work in any orientation, but on this one you must line up that hole with the protrusion on the wrench, and it works like a charm. 3) There IS a very nice magnet in this bit holder, and it holds the bits in very securely. I tried to shake a bit off, and it didn't budge. But the magnet isn't so powerful that it's hard to pull the bit out. It's perfect. I know this information is pretty basic, but when I was looking at this bit holder I wasn't completely sure what it was for, so I thought I'd provide more details for others who might be similarly unsure. Hope it helps someone.

## Features

- These IRWIN 3/8-inch Square Drive Insert Bit Holders are available with or without magnet and C-ring
- They are designed for use with socket wrenches and adapters
- This product is made of high quality material

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0040UFB4G |
| Batteries Required? | No |
| Bit Compatibilities | adapter, bit holder, socket wrench |
| Brand | IRWIN |
| Compatible Fastener Range | 0.375 inches |
| Customer Reviews | 4.6 4.6 out of 5 stars (389) |
| Date First Available | February 13, 2012 |
| Drive Bit Shank Style | square shank |
| Drive System | Square |
| Global Trade Identification Number | 00024721108326 |
| Included Components | Drill Bits & Accessories, Hex Shank Drill Bits, Power Tool Accessories |
| Item Package Quantity | 1 |
| Item Weight | 0.01 ounces |
| Item model number | 4935071 |
| Manufacturer | AMEX9 |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part Number | 4935071 |
| Product Dimensions | 6.4 x 2.3 x 0.54 inches |
| Size | One Size |
| UPC | 024721108326 |
| Voltage | 1 Volts |
| Wattage | 1 watts |

## Product Details

- **Brand:** IRWIN
- **Drive Bit Shank Style:** square shank
- **Drive System:** Square
- **Number of Pieces:** 1
- **UPC:** 024721108326

## Images

![IRWIN Magnetic Bit Holder, 3/8-Inch (4935071) - Image 1](https://m.media-amazon.com/images/I/91HrcSli9VL.jpg)
![IRWIN Magnetic Bit Holder, 3/8-Inch (4935071) - Image 2](https://m.media-amazon.com/images/I/71cspnODGGL.jpg)
![IRWIN Magnetic Bit Holder, 3/8-Inch (4935071) - Image 3](https://m.media-amazon.com/images/I/21LzttjGTFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great find on here
*by T***X on August 19, 2017*

Great find on here, nice adapter that was hard to find in stores, exactly what I needed. I've got the 20v DeWalt 3/8 impact and wanted a single adapter for drill bit heads, instead of 2 or 3 piece one I was using, worked perfect and yes, magnetic as described.

### ⭐⭐⭐⭐⭐ Fantastic! I wish I had known this little tool existed. I could have used this years ago.
*by B***H on December 18, 2017*

Three things I want to say about this little bit holder: 1) Just to be clear, this is little tool has a hole on each end. On one end there is a hole (the hole you can't see in the photo) which is a square 3/8 inch hole designed to be snapped on to a 3/8 inch socket wrench, just like you would any socket. On the other end there is a hole (the one you CAN see in the photo). That end is designed to hold those little screwdriver type bits (like torx bits, phillips, whatever) that you would typically use in an electric drill, or an electric screwdriver. Why would you want this? Well, basically it enables you to use your socket wrench like a ratcheting screwdriver in places where a typical screwdriver is too long to work. This enables you to use your socket wrench like a right angled ratcheting screwdriver. 2) Notice that hole on the side of the bit holder. Many socket wrenches have a "quick release" feature that does two things. First, it holds your socket in place so it won't fall off. It would be tough to even pull it off if you tried, and you don't want the socket pulling off when you're working with it. Second, it allows you to take the socket off the wrench by pushing a button on the back of the wrench. It will literally fall off in your hand. In order for that quick release feature to be used with this item, you will need to line up that hole on the side with the little protrusion on the socket wrench. Many (most) sockets are designed so the quick release will work in any orientation, but on this one you must line up that hole with the protrusion on the wrench, and it works like a charm. 3) There IS a very nice magnet in this bit holder, and it holds the bits in very securely. I tried to shake a bit off, and it didn't budge. But the magnet isn't so powerful that it's hard to pull the bit out. It's perfect. I know this information is pretty basic, but when I was looking at this bit holder I wasn't completely sure what it was for, so I thought I'd provide more details for others who might be similarly unsure. Hope it helps someone.

### ⭐⭐⭐⭐ Must have for impact driver
*by T***S on August 18, 2020*

Works as described but wish the magnet was stronger.

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---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-04-22*