1. Introduction
This manual provides essential information for the safe and effective use of your Milwaukee MW4932459398 Shockwave Magnetic Bit Holder. Designed for impact duty, this 73mm bit holder offers secure bit retention and magnetic functionality for various fastening applications. Please read these instructions carefully before use and retain them for future reference.
2. Safety Information
Always observe basic safety precautions when using power tools and accessories to reduce the risk of personal injury. This bit holder is designed for use with appropriate power tools and bits.
- Eye Protection: Always wear ANSI Z87.1 compliant eye protection when operating power tools.
- Tool Compatibility: Ensure the bit holder is compatible with your power tool's chuck type (typically 1/4 inch hex shank).
- Bit Compatibility: Use only bits designed for impact applications with this Shockwave bit holder.
- Secure Attachment: Ensure the bit holder and bit are securely seated before operation.
- Inspect Before Use: Check the bit holder for any signs of damage or wear before each use. Do not use if damaged.
3. Setup and Installation
Follow these steps to properly set up your Milwaukee Shockwave Magnetic Bit Holder:
- Insert Bit Holder into Power Tool:
Insert the hex shank end of the bit holder into the chuck of your impact driver or drill. Ensure it is fully seated and the chuck is tightened securely to prevent slippage during operation.

The Milwaukee Shockwave Magnetic Bit Holder, showcasing its robust construction and magnetic tip.
- Insert Bit into Bit Holder:
Push the desired 1/4 inch hex shank bit firmly into the front opening of the bit holder. The magnetic tip will help hold the bit in place, and the locking mechanism will engage for secure retention.

A Milwaukee Shockwave Bit Holder with a T-25 screwdriver bit securely inserted, demonstrating how bits are held.

A detailed view of the Milwaukee Shockwave Bit Holder, illustrating the secure locking mechanism around a T-25 bit.
4. Operating Instructions
Once the bit holder and bit are securely installed, you can proceed with your fastening task:
- Engage Fastener: Place the tip of the bit into the head of the fastener.
- Apply Pressure: Apply firm, steady pressure to the power tool, keeping it aligned with the fastener.
- Operate Tool: Activate your power tool to drive or remove the fastener. The Shockwave design is engineered to withstand the high torque of impact drivers.
- Bit Removal: To remove a bit, pull back the collar on the bit holder and extract the bit.
5. Maintenance
Proper maintenance ensures the longevity and performance of your bit holder:
- Cleaning: Keep the bit holder clean and free of debris, especially around the magnetic tip and locking mechanism. Use a dry cloth to wipe it down.
- Inspection: Regularly inspect the bit holder for signs of wear, cracks, or deformation. Pay close attention to the hex shank and the bit retention mechanism.
- Storage: Store the bit holder in a dry environment, away from corrosive materials.
6. Troubleshooting
If you encounter issues with your bit holder, consider the following:
- Bit Not Holding Securely:
Check for debris or metal shavings inside the bit holder that might be obstructing the magnetic tip or locking mechanism. Ensure the bit's hex shank is clean and undamaged. If the mechanism is worn, replacement may be necessary.
- Bit Holder Not Fitting in Chuck:
Verify that your power tool has a 1/4 inch hex chuck. Ensure the bit holder's shank is free of damage or deformation that would prevent proper insertion.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Milwaukee |
| Model Number | MW4932459398 |
| Part Number | MW4932459398 |
| Length | 73 mm |
| Shank Type | Hex (1/4 inch) |
| Material | High-speed steel |
| Finish Type | Polished |
| Item Weight | 1.76 ounces |
| Global Trade Identification Number (GTIN) | 04058546010591 |
Note: The 73mm length is indicated on the product packaging. Other dimensions (0.28 x 0.28 x 1.22 inches) may refer to specific components or packaging details.

Front view of the Milwaukee Shockwave Bit Holder packaging, highlighting its 73mm length and 'Shockwave Impact Duty' designation.

Rear view of the Milwaukee Shockwave Bit Holder packaging, displaying the barcode (GTIN: 04058546010591) and manufacturer information.
8. Warranty and Support
For warranty information or technical support regarding your Milwaukee MW4932459398 Shockwave Magnetic Bit Holder, please refer to the official Milwaukee website or contact their customer service department. Keep your proof of purchase for any warranty claims.