1. Introduction
Thank you for choosing the BLACK+DECKER MTOS4-XJ Multi-Evo Multi-Tool Oscillating Attachment. This attachment is designed to expand the versatility of your BLACK+DECKER Multi-Evo base unit, enabling a wide range of cutting, sanding, and scraping tasks. Please read this manual carefully before use to ensure safe and effective operation.
2. Important Safety Instructions
Always observe basic safety precautions when using power tools to reduce the risk of fire, electric shock, and personal injury. Keep this manual for future reference.
General Power Tool Safety
- Work Area Safety: Keep your work area clean and well-lit. Cluttered or dark areas invite accidents. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Electrical Safety: This attachment is powered by the Multi-Evo base unit. Ensure the base unit's power source matches the voltage on its nameplate. Avoid body contact with earthed or grounded surfaces.
- Personal Safety: Always wear eye protection. Use a dust mask if operating in dusty conditions. Wear non-skid safety shoes and a hard hat when necessary. Do not overreach. Keep proper footing and balance at all times.
- Tool Use and Care: Do not force the tool. Use the correct tool for your application. Disconnect the attachment from the base unit before making any adjustments, changing accessories, or storing the tool.
Specific Oscillating Attachment Safety
- Accessory Compatibility: Only use accessories specifically designed for oscillating multi-tools and compatible with the Super-Lok quick-fit system.
- Workpiece Security: Always secure the workpiece firmly. Do not hold small workpieces by hand.
- Hidden Hazards: Before cutting into walls, floors, or other areas, check for hidden electrical wires, gas pipes, or water pipes.
- Vibration: Prolonged use may cause hand-arm vibration. Take regular breaks and use anti-vibration gloves if available.
3. Product Overview
The BLACK+DECKER MTOS4-XJ is an oscillating attachment designed for the Multi-Evo system. It transforms your Multi-Evo base unit into a versatile oscillating tool, ideal for detailed cutting, sanding, scraping, and grout removal tasks.

Figure 1: The BLACK+DECKER Multi-Evo system demonstrating various interchangeable attachments, including the oscillating head.
Key features of the MTOS4-XJ attachment include:
- High Performance: Achieves an idle speed of up to 24,000 rpm and a vibration rate of 16,300 v/min for efficient material removal.
- Super-Lok Quick-Fit System: Allows for fast and tool-free accessory changes, enhancing productivity and convenience.
- Versatility: Compatible with a wide range of oscillating accessories for various applications.

Figure 2: Detailed view of the BLACK+DECKER MTOS4-XJ Oscillating Attachment, highlighting its design and quick-fit mechanism.
4. Setup
Attaching the Oscillating Head to the Multi-Evo Base Unit
- Ensure the Multi-Evo base unit is switched off and disconnected from its power source (or battery removed).
- Align the oscillating attachment with the front of the Multi-Evo base unit.
- Push the attachment firmly onto the base unit until it clicks securely into place. Ensure there is no wobble.
- To remove, press the release button (if present on your Multi-Evo model) and pull the attachment off.
Installing/Changing Accessories (Super-Lok System)
- Ensure the oscillating attachment is securely mounted on the Multi-Evo base unit, and the base unit is powered off.
- Locate the Super-Lok quick-fit lever or mechanism on the oscillating head.
- Open the quick-fit mechanism. This will release the accessory mounting pin.
- Align the desired oscillating accessory (e.g., cutting blade, sanding pad) with the accessory mounting interface on the oscillating head. The accessory should fit snugly onto the pin and engage with the drive mechanism.
- Close the quick-fit mechanism firmly until it locks. Verify that the accessory is securely held and does not move freely.
- To remove an accessory, simply open the quick-fit mechanism and pull the accessory off.
5. Operating Instructions
Before operating, ensure all safety precautions are understood and followed. Always wear appropriate personal protective equipment, including eye protection.
General Operation
- Power On: Once the attachment and accessory are securely installed, connect the Multi-Evo base unit to its power source or insert the battery.
- Grip: Hold the Multi-Evo tool firmly with both hands, ensuring a stable grip.
- Starting: Press the trigger or power switch on the Multi-Evo base unit to start the oscillating action.
- Application: Gently bring the oscillating accessory into contact with the workpiece. Apply steady, even pressure. Avoid forcing the tool, as this can reduce efficiency and damage the accessory or workpiece.
- Stopping: Release the trigger or power switch to stop the tool. Allow the accessory to come to a complete stop before setting the tool down.
Tips for Specific Tasks
- Cutting: For plunge cuts, position the blade at the desired starting point and slowly push it into the material. For flush cuts, ensure the blade is parallel to the surface.
- Sanding: Use appropriate grit sanding pads for the material. Move the tool in a circular or back-and-forth motion, keeping it flat against the surface for even sanding.
- Scraping: Use a rigid scraper blade. Hold the tool at a shallow angle to the surface and apply consistent pressure to remove material.
- Material Compatibility: This attachment is suitable for working with materials such as wood and metal, depending on the accessory used.

Figure 3: The BLACK+DECKER Multi-Evo oscillating tool in action, demonstrating its use for cutting tasks.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your oscillating attachment.
Cleaning
- Always disconnect the attachment from the Multi-Evo base unit before cleaning.
- Wipe the attachment with a clean, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Clear any dust or debris from the accessory mounting area and ventilation slots using a soft brush or compressed air.
Accessory Replacement
- Replace worn or damaged accessories promptly. Dull blades or sanding pads can reduce efficiency and increase strain on the tool.
- Refer to the 'Installing/Changing Accessories' section for proper replacement procedures.
Storage
- Store the attachment in a dry, secure place, out of reach of children.
- Avoid storing in direct sunlight or areas with extreme temperatures.
7. Troubleshooting
If you encounter issues with your BLACK+DECKER MTOS4-XJ oscillating attachment, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Attachment does not operate. | Base unit not powered; attachment not securely connected. | Ensure Multi-Evo base unit is connected to power/has charged battery. Re-attach the oscillating head firmly until it clicks. |
| Poor cutting/sanding performance. | Worn or incorrect accessory; excessive pressure. | Replace the accessory. Use the correct accessory for the material. Apply lighter, consistent pressure. |
| Accessory wobbles or falls off. | Quick-fit mechanism not fully engaged; incorrect accessory installation. | Ensure the quick-fit mechanism is locked. Re-install the accessory, ensuring it is properly aligned. |
| Excessive vibration. | Damaged accessory; loose attachment. | Inspect and replace damaged accessories. Ensure the attachment is securely fastened to the base unit. |
If the problem persists after attempting these solutions, please contact BLACK+DECKER customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | MTOS4-XJ |
| No-load Speed | 0 - 24,000 rev/min |
| Oscillating Speed | 0 - 16,300 bpm |
| Quick-release System | Yes (Super-Lok) |
| Voltage (via base unit) | 14.4 Volts |
| Item Weight | 500 Grams (1.1 pounds) |
| Product Dimensions | 7.09 x 5.31 x 3.74 inches |
| Blade Material | High Speed Steel (for included accessory, if any) |
| Surface Recommendation | Wood, Metal (with appropriate accessories) |
9. Warranty and Support
Warranty Information
This BLACK+DECKER MTOS4-XJ Multi-Evo Multi-Tool Oscillating Attachment comes with a 2-year limited warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, abuse, alteration, or normal wear and tear.
Customer Support
For technical assistance, warranty claims, or to purchase replacement parts and accessories, please contact BLACK+DECKER customer support. Refer to the official BLACK+DECKER website or your product packaging for the most current contact information in your region.
Online Resources: Visit the official BLACK+DECKER website for product registration, FAQs, and additional support materials.
