---
product_id: 35326068
title: "Sys 4 Micro Bit Adapter 4mm to 1/4\" 38mm"
brand: "wiha"
price: "¥3261"
currency: JPY
in_stock: true
reviews_count: 8
category: "Wiha"
url: https://www.desertcart.jp/products/35326068-sys-4-micro-bit-adapter-4mm-to-1-4-38mm
store_origin: JP
region: Japan
---

# 4mm to 1/4" precision fit 38mm length for optimal torque Modified tool steel durability Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm

**Brand:** wiha
**Price:** ¥3261
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your toolkit: small bits, big power, zero compromise!

## Quick Answers

- **What is this?** Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm by wiha
- **How much does it cost?** ¥3261 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/35326068-sys-4-micro-bit-adapter-4mm-to-1-4-38mm)

## Best For

- wiha enthusiasts

## Why This Product

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

## Key Features

- • **Durable Build:** Crafted from modified tool steel to withstand rigorous daily use without wear.
- • **Ergonomic Upgrade:** Transforms tiny micro bits into comfortable, full-size screwdriver tools—work smarter, not harder.
- • **Secure Fit Design:** Snaps bits firmly into place, eliminating frustrating slips and boosting your workflow efficiency.
- • **Compact Yet Mighty:** 38mm adapter length balances control and torque for professional-grade performance.
- • **Seamless Bit Compatibility:** Effortlessly connect micro bits to standard 1/4" handles for ultimate versatility.

## Overview

The Wiha Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm is a precision-engineered tool accessory that converts micro bits to fit standard 1/4" screwdriver handles. Made from durable modified tool steel, it offers a secure snap-fit connection and an optimal 38mm length for enhanced torque and comfort, making it an essential upgrade for professionals seeking versatility and reliability in their toolkit.

## Description

Wiha 75803 Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm

Review: Non magnetic but no need for that - It would be great if adapter is magnetic. Bits fall off constantly if not supported by finger. Maybe I’ll be able to magnetize it myself or stick a magnet to it. Update: just realized that if bit pushed harder into adapter it snaps into place and holds there strong. Bringing stars from 3 to 5
Review: What's In A Name? - Okay, I wanted one of these for years, but I didn't know what to call it so i could look for it. One day inspiration hit, I searched for Micro Bit To 1/4" Adapter, and that was close enough. Success! What this does it it lets you use your little tiny micro bits with a full size screwdriver handle for Improved Comfort. This also gives you enough torque to chowder your micro bits -- don't do that.

## Features

- Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00XIPRIVI |
| Best Sellers Rank | #377,490 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,100 in Screwdriver Bit Sets |
| Brand Name | Wiha |
| Color | Multi |
| Customer Reviews | 4.5 4.5 out of 5 stars (164) |
| Date First Available | September 30, 2015 |
| Included Components | Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm |
| Item Dimensions LxWxH | 1 x 1 x 1 inches |
| Item Package Dimensions L x W x H | 2.87 x 1.46 x 0.28 inches |
| Item Weight | 0.02 Pounds |
| Manufacturer | Wiha |
| Material | modified tool steel |
| Model Name | 75803 |
| Number of Items | 1 |
| Package Weight | 0.01 Kilograms |
| Part Number | 75803 |
| Size | One Size |
| Suggested Users | Unisex-Adult |

## Images

![Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm - Image 1](https://m.media-amazon.com/images/I/51ndaHGiRtL.jpg)
![Sys 4 Micro Bit Adapter 4mm to 1/4" 38mm - Image 2](https://m.media-amazon.com/images/I/51ZUlEIalCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Non magnetic but no need for that
*by E***N on October 1, 2022*

It would be great if adapter is magnetic. Bits fall off constantly if not supported by finger. Maybe I’ll be able to magnetize it myself or stick a magnet to it. Update: just realized that if bit pushed harder into adapter it snaps into place and holds there strong. Bringing stars from 3 to 5

### ⭐⭐⭐⭐⭐ What's In A Name?
*by M***V on June 11, 2023*

Okay, I wanted one of these for years, but I didn't know what to call it so i could look for it. One day inspiration hit, I searched for Micro Bit To 1/4" Adapter, and that was close enough. Success! What this does it it lets you use your little tiny micro bits with a full size screwdriver handle for Improved Comfort. This also gives you enough torque to chowder your micro bits -- don't do that.

### ⭐⭐⭐⭐ Good alternative to magnetic bit holders.
*by T***Y on January 21, 2026*

This allows you to use the "micro" 4mm bits in a 1/4" bit driver using spring retention instead of a magnet. I use this for edc purposes since 4mm bits are more compact but 1/4" drivers are more ubiquitous. There are a lot of companies that make this same thing that use magnetic retention instead of spring retention. The spring gives the 4mm bit a tighter fit in the adapter than you get from magnetic adapters. They don't wiggle as much. And the bit will never fall out, you really have to pull hard to remove them. If you want something that's quick and easy to pop the bits in and out I'd get a magnetic one, this is actually a little hard to insert and remove, but I like that. It's also longer than your average magnetic adapter which personally I like. It allows me to use the adapter as it's own little screw driver for things likes eyeglass screws. 4mm bits are pretty tiny, for tiny screws, and sometimes a tiny screwdriver is better than a larger one and for the smallest screws the adapter can be a stand alone mini screw driver (its 1.5" long, almost 4 cm). I took off a star because on the 4four1/4" bit drivers I tested this on it didn't fit in one of them. The reason it didn't fit is because the stainless steel sleeve that holds the 4mm bit is a larger diamter than the darker steel 1/4" end that fits in the bit driver. So on one of my drivers which was deeper than the rest this adapter didn't fit deep enough in the driver to reach the magnet. Luckily I was able to file down the stainless steel part to get it to fit.

## Frequently Bought Together

- Wiha 75803 Long 1/4 Insert Bit to System 4 Micro Bit Adaptor by Wiha Tools
- Wiha 28103 Magnetic 1/4 Bit Holder, Stubby, 57mm
- Wiha 72596 10 Piece Bit Set Hex Inch

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-26*