1. Introduction
Thank you for choosing the BLACK+DECKER MT300KA-QS 300W Multi-Tool. This versatile tool is designed for a wide range of applications including cutting, sanding, scraping, and removing materials. Its robust construction ensures durability and reduced maintenance, making it an essential tool for various tasks. Please read this manual carefully before operating the tool to ensure safe and efficient use.

Image 1.1: The BLACK+DECKER MT300KA-QS 300W Multi-Tool, showcasing its compact design and ergonomic grip.
2. Safety Information
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep this manual for future reference.
General Power Tool Safety Warnings
- 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. Power tools create sparks which may ignite the dust or fumes.
- Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
- Personal Safety: Always wear eye protection. Use safety glasses, goggles, or a face shield. Wear hearing protection when operating the tool for extended periods. Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing, and gloves away from moving parts.
- Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed. Disconnect the plug from the power source before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
3. Product Overview
The BLACK+DECKER MT300KA-QS Multi-Tool is a versatile device designed for various tasks. Familiarize yourself with its components before operation.
Key Components
- Power Switch: Controls the tool's power.
- Variable Speed Dial: Allows adjustment of oscillation speed for different applications (10,000-22,000 orbits/minute).
- Accessory Attachment System (Superlok): Enables quick and easy accessory changes without additional tools.
- Dust Extraction Port: For connecting a dust extraction system during sanding operations to maintain a clean work environment.

Image 3.1: Close-up view of the variable speed dial on the BLACK+DECKER MT300KA-QS Multi-Tool, showing settings from 1 to 6.
Included Accessories
The MT300KA-QS comes with 11 assorted accessories, including various blades for cutting and scraping, and sanding sheets for different finishes. A robust carrying case is also included for storage and transport.

Image 3.2: A selection of blades and sanding pads included with the multi-tool, designed for various applications.

Image 3.3: The BLACK+DECKER MT300KA-QS Multi-Tool shown with its durable carrying case and a range of accessories.
4. Setup
Proper setup ensures optimal performance and safety. The Superlok accessory attachment system allows for quick and tool-free changes.
Attaching Accessories
- Ensure the tool is unplugged from the power source.
- Locate the Superlok lever on the tool head.
- Push the lever to release the accessory clamp.
- Align the desired accessory (e.g., cutting blade, sanding pad) with the tool's spindle.
- Push the lever back to secure the accessory firmly in place. Verify that the accessory is locked and does not wobble.

Image 4.1: A user attaching a cutting blade to the multi-tool, highlighting the quick-release mechanism.
Attaching Sanding Pads
- Follow steps 1-3 from "Attaching Accessories" to attach the sanding base plate.
- Select the appropriate grit sanding sheet for your task.
- Align the holes on the sanding sheet with the holes on the sanding base plate.
- Press the sanding sheet firmly onto the hook-and-loop surface of the base plate.

Image 4.2: A user applying a triangular sanding sheet to the multi-tool's sanding attachment.
5. Operating Instructions
The MT300KA-QS is designed for precision and control across various applications. Always ensure the correct accessory is fitted for the task.
General Operation
- After attaching the desired accessory, plug the tool into a suitable power outlet.
- Adjust the variable speed dial to the appropriate setting for your material and task. Lower speeds are generally for softer materials or more delicate work, while higher speeds are for harder materials or faster removal.
- Hold the tool firmly with both hands, ensuring a stable grip.
- Press the power switch to start the tool.
- Apply gentle pressure and guide the tool smoothly over the workpiece. Avoid excessive force, as this can damage the tool or the material.
Sanding
For sanding, attach the sanding base and appropriate grit sanding sheet. The integrated dust extraction system helps keep your work area clean.

Image 5.1: The multi-tool in action, sanding a wooden panel with a blue painted section, demonstrating its use for surface preparation.
Cutting and Scraping
Use the appropriate cutting or scraping blade for your material. The oscillating action is ideal for precise cuts in tight spaces or for removing stubborn materials.

Image 5.2: A user utilizing the multi-tool to scrape old sealant from the edge of a bathtub, showcasing its utility for removal tasks.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your multi-tool.
- Cleaning: After each use, unplug the tool and clean the exterior with a damp cloth. Do not use harsh chemicals or abrasive cleaners. Ensure ventilation openings are clear of dust and debris.
- Accessory Inspection: Regularly inspect accessories for wear or damage. Replace worn blades or sanding sheets to maintain cutting/sanding efficiency and prevent damage to the tool or workpiece.
- Storage: Store the tool and its accessories in the provided carrying case in a dry, secure location, out of reach of children.
7. Troubleshooting
If you encounter issues with your BLACK+DECKER MT300KA-QS Multi-Tool, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | No power supply; Faulty power switch | Check power connection and outlet. Ensure switch is fully engaged. If problem persists, contact service. |
| Reduced performance / Excessive vibration | Worn or dull accessory; Incorrect accessory attachment | Replace accessory. Ensure accessory is securely attached using the Superlok system. |
| Tool overheats | Prolonged heavy use; Blocked ventilation slots | Allow tool to cool down. Clear any obstructions from ventilation slots. Reduce load during operation. |
8. Specifications
Detailed technical specifications for the BLACK+DECKER MT300KA-QS Multi-Tool:
- Model Number: MT300KA-QS
- Power: 300W
- Voltage: 230 Volts
- Oscillation Speed: 10,000-22,000 orbits/minute (variable speed)
- Power Source: Corded Electric
- Product Dimensions: 34.7 x 7.01 x 22 cm
- Item Weight: 1.58 Kilograms
- Number of Items: 1 (tool)
- Number of Pieces: 11 (accessories)
- Special Features: Superlok accessory change, Integrated dust extraction, Variable speed
- Plug Type: C - 2 pin Europlug
- Sound Level: 44 Decibels
9. Warranty and Support
BLACK+DECKER products are manufactured to high-quality standards and are guaranteed against manufacturing defects. For specific warranty details, please refer to the warranty card included with your product or visit the official BLACK+DECKER website. If you require assistance, spare parts, or technical support, please contact BLACK+DECKER customer service through their official channels.
Keep your purchase receipt as proof of purchase for any warranty claims.





