1. Introduction
This manual provides essential information for the safe and effective use of your Faithfull FAIMFWAVY Wavy Edge Insulation Cutter Blade. This blade is designed for use with compatible multi-function oscillating power tools to cut insulation board, foam, and other soft materials. Please read this manual thoroughly before installation and operation to ensure proper usage and to maximize the blade's lifespan.
2. Safety Information
Always adhere to the following safety guidelines when using the Faithfull FAIMFWAVY blade:
- Personal Protective Equipment (PPE): Always wear appropriate safety glasses, gloves, and hearing protection when operating power tools.
- Power Tool Safety: Refer to your oscillating multi-tool's instruction manual for specific safety warnings and operating procedures.
- Disconnect Power: Always disconnect the power tool from its power source before changing blades, making adjustments, or performing maintenance.
- Secure Workpiece: Ensure the material being cut is securely clamped or held to prevent movement during operation.
- Sharp Edges: The blade has sharp edges. Handle with care to prevent injury.
- Intended Use: Use the blade only for its intended purpose: cutting insulation board, foam, and other soft materials. Do not use on hard materials like wood, metal, or masonry.
- Inspect Blade: Before each use, inspect the blade for any signs of damage, cracks, or excessive wear. Do not use a damaged blade.
3. Product Overview
The Faithfull FAIMFWAVY blade is a specialized accessory for oscillating multi-tools, designed for efficient cutting of soft materials.

Figure 1: Faithfull FAIMFWAVY Wavy Edge Insulation Cutter Blade. This image displays the full length of the Faithfull FAIMFWAVY blade, highlighting its wavy cutting edge and the multi-fit attachment mechanism at the top. The brand name 'FAITHFULL QUALITY TOOLS' is visible on the mounting bracket, and 'SK7 / Insulation 28mm 1-1/8"' is printed on the blade itself.
Key Features:
- Wavy Edge Design: Facilitates fast, precise, and deep cuts in soft materials.
- Material: Manufactured from high carbon SK7 blued steel for durability and long life.
- Compatibility: Designed to be compatible with many multi-function oscillating power tools.
- Applications: Ideal for cutting insulation board, foam, and other similar soft materials.
4. Setup: Attaching the Blade
Follow these general steps to attach the Faithfull FAIMFWAVY blade to your oscillating multi-tool. Always refer to your specific tool's manual for detailed instructions.
- Ensure Tool is Off and Unplugged: Before handling the blade or tool, confirm the multi-tool is switched off and disconnected from its power source to prevent accidental startup.
- Open Blade Clamp: Locate the blade clamping mechanism on your oscillating multi-tool. Depending on your tool model, this may involve a lever, a screw, or a quick-release system. Open the clamp to allow blade insertion.
- Insert Blade: Align the mounting holes/slots on the Faithfull FAIMFWAVY blade with the pins or attachment points on your multi-tool's head. Ensure the blade is seated firmly and correctly.
- Secure Blade: Close and tighten the blade clamping mechanism according to your tool's instructions. Verify that the blade is securely fastened and does not wobble.
- Test Fit: Gently tug on the blade to confirm it is securely attached before reconnecting power.
5. Operating Instructions
Once the blade is securely attached, you can begin cutting. Always prioritize safety and follow these guidelines for optimal performance:
- Material Preparation: Ensure the insulation board or foam is clean and free of debris. Mark your cutting line clearly.
- Tool Grip: Hold the oscillating multi-tool firmly with both hands, maintaining good balance and control.
- Starting the Cut: Position the blade gently against the material at your desired starting point. Turn on the multi-tool.
- Cutting Technique: Allow the blade to do the work. Apply steady, moderate pressure. Do not force the blade through the material, as this can lead to poor cuts, blade damage, or tool kickback. The wavy edge is designed for smooth progression.
- Deep Cuts: For thicker materials, you may need to make multiple passes or use a rocking motion to achieve the desired depth.
- Controlling the Cut: Guide the tool along your marked line. The oscillating action will create a clean cut in soft materials.
- Finishing the Cut: Once the cut is complete, turn off the multi-tool and wait for the blade to stop oscillating before setting the tool down.
6. Maintenance
Proper maintenance extends the life of your Faithfull FAIMFWAVY blade and ensures consistent performance.
- Cleaning: After each use, disconnect the blade from the tool and carefully clean any accumulated foam or insulation residue from the blade using a brush or cloth. Avoid using harsh chemicals that could damage the steel.
- Inspection: Regularly inspect the blade for signs of wear, dullness, or damage to the wavy edge. A dull blade will require more force and produce less efficient cuts.
- Storage: Store the blade in a dry, safe place, away from moisture and out of reach of children. Consider using a blade protector or original packaging to prevent accidental contact with the sharp edges.
- Replacement: Replace the blade when it becomes dull or damaged to maintain cutting efficiency and safety.
7. Troubleshooting
If you encounter issues while using your Faithfull FAIMFWAVY blade, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| Blade not cutting effectively or tearing material. | Dull blade; incorrect cutting angle; forcing the cut; material too dense/hard. | Replace blade; adjust cutting angle; reduce pressure; confirm material is suitable for this blade. |
| Blade mount breaks or blade detaches. | Improper installation; excessive force; material too hard; manufacturing defect. | Ensure blade is securely fastened; do not force the tool; use for intended soft materials only; contact retailer if defect is suspected. |
| Excessive vibration or noise. | Loose blade; damaged blade; tool malfunction. | Check blade attachment; replace damaged blade; inspect multi-tool for issues. |
8. Specifications
The following are the technical specifications for the Faithfull FAIMFWAVY blade:
| Specification | Detail |
|---|---|
| Model Number | MFWAVY |
| Manufacturer | Faithfull |
| Material | SK7 blued steel |
| Cutting Length | 100mm |
| Width | 8-28mm |
| Item Weight | 0.705 ounces |
| Product Dimensions | 3.58 x 9.53 x 0.67 inches |
| Style | Oscillating |
| Included Components | SK7 Wavy Edge Insulation Cutter Blade 100mm |
9. Warranty and Support
For information regarding warranty coverage or technical support for your Faithfull FAIMFWAVY blade, please refer to the documentation provided with your purchase or contact the retailer from whom the product was acquired. You may also visit the official Faithfull Tools website for general product information and support resources.





