<h2>2-Pack Hex Shank 6.35mm to 4mm Insert Bit Adapter with Magnetic Holder</h2> <p>Upgrade your toolkit with this <strong>2-pack Hex Shank Bit Adapter</strong> — the smart solution for converting your 1/4" (6.35mm) hex shank electric screwdriver or drill into a 4mm insert bit holder. Made from tough <strong>Chromium Vanadium Steel (Cr-V)</strong>, these compact magnetic adapters are built for lasting performance in woodworking, home repair, and all your DIY projects. Made in Mainland China.</p> <h3>Key Features</h3> <ul> <li> <strong>Universal Conversion:</strong> Seamlessly adapts a standard 6.35mm (1/4") hex shank to a 4mm insert bit plug — works with most electric screwdrivers and drills.</li> <li> <strong>Magnetic Bit Retention:</strong> Built-in magnetic holder keeps your insert bits firmly in place during use, reducing drop-and-search frustration.</li> <li> <strong>Premium Cr-V Steel Construction:</strong> Chromium Vanadium Steel provides excellent hardness, toughness, and corrosion resistance for long-lasting durability in the toolbox.</li> <li> <strong>Quick &amp; Easy Attachment:</strong> No special tools or complicated steps required — simply attach the adapter to your existing driver and get to work.</li> <li> <strong>Save Space &amp; Money:</strong> Eliminate the need to purchase multiple drill bit sets in different sizes. One adapter handles the conversion, improving efficiency and saving time.</li> <li> <strong>Wide Compatibility:</strong> Ideal for DIY enthusiasts, woodworkers, electricians, and tradespeople tackling home repair, furniture assembly, cabinetry, and more.</li> <li> <strong>Pack of 2:</strong> Two adapters included so you can keep one on each driver or have a spare ready.</li> </ul> <h3>Specifications</h3> <table> <tr> <td><strong>Material</strong></td> <td>Chromium Vanadium Steel (Cr-V)</td> </tr> <tr> <td><strong>Shank Size</strong></td> <td>1/4" (6.35mm) Hex Shank</td> </tr> <tr> <td><strong>Output Size</strong></td> <td>4mm Insert Bit</td> </tr> <tr> <td><strong>Package Contents</strong></td> <td>2 x Hex Shank Bit Adapter</td> </tr> <tr> <td><strong>Origin</strong></td> <td>Made in Mainland China</td> </tr> </table> <p><em>Note: Please allow minor measurement tolerances due to manual sizing. Colours may appear slightly different depending on your monitor settings.</em></p> <h3>Related Products You May Like</h3> <ul> <li><a href="/products/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy">Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool</a></li> <li><a href="/products/garden-pruner-shears-secateurs-bonsai-fruit-trees">Garden Pruner Shears – Secateurs for Bonsai &amp; Fruit Trees</a></li> <li><a href="/products/360-bicycle-chain-cleaner-tool-gear-cleaning-kit">360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit</a></li> </ul> <p>Learn more: <a href="https://www.osha.gov/personal-protective-equipment" target="_blank" rel="noopener">OSHA on personal protective equipment</a></p> <h3>Frequently Asked Questions</h3> <h4>Q: What size bits does this hex shank bit adapter convert between?</h4> <p>A: This adapter converts a standard 1/4" (6.35mm) hex shank — common on most electric screwdrivers and cordless drills — to a 4mm insert bit plug, allowing you to use 4mm micro insert bits with your existing driver.</p> <h4>Q: Is the adapter compatible with my cordless electric screwdriver?</h4> <p>A: Yes! The 6.35mm hex shank is the universal standard for the vast majority of electric screwdrivers, power drills, and drill drivers. Simply insert the adapter's hex shank into your tool's chuck and you're ready to use 4mm insert bits.</p> <h4>Q: Why do I need a magnetic bit holder adapter?</h4> <p>A: The built-in magnet holds your 4mm insert bits securely in place during work, preventing them from falling out mid-task. This makes one-handed bit changes faster and keeps small bits from getting lost on the job site or workshop floor.</p> <h4>Q: What