Mutt Tools 2pc Feeler Gauge Set Review: Precision Measurement for Automotive Work

For mechanics and DIY enthusiasts, precision is everything—especially when adjusting valves or setting spark plug gaps. The Mutt Tools 2pc Feeler Gauge Set promises professional-grade accuracy with 32 blades in straight and angled designs, covering both inch and metric measurements. After testing its durability, readability, and real-world usability, here’s why it might be the last gap tool kit you’ll ever need .

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1. Key Features & Specifications

• 32 Blades: Includes straight and angled feeler gauges with inch (.0015–.035″) and metric (0.04–0.88mm) ranges .
• Laser-Etched Markings: Sizes remain legible long-term, unlike stamped markings that wear off .
• Stainless Steel Construction: Resists rust and corrosion, ensuring longevity in greasy or humid environments .
• Angled Design: Recessed valves and tight engine bays become accessible without disassembly .
• Protective Case: Keeps blades organized and prevents bending or damage during storage .

2. Design & Build Quality

The Mutt Tools set stands out with its alloy steel blades and reinforced stainless steel holders. The angled gauge features a tapered tip for sliding into narrow gaps, while the straight gauge offers rigidity for precise measurements. The laser-etched markings survived rigorous testing with solvents like brake cleaner, proving their durability .

⚙️ Pro Tip: Use the angled gauge for overhead cam valves and the straight gauge for spark plugs or points.

3. Performance in Real-World Applications

• Valve Adjustments: Angled gauge reached Honda Civic valves without removing the camshaft .
• Spark Plug Gaps: .025″ blade accurately set gaps on a Chevy Small Block .
• Motorcycle Maintenance: Metric blades (0.15–0.30mm) perfect for Japanese bike valves .
• Non-Automotive Uses: Guitarists praised it for setting string action heights .

4. Pros & Cons from Testing

Pros:

• Clear, permanent laser-etched markings .
• Angled gauge accesses confined spaces .
• Inch/metric versatility suits import/domestic vehicles .
• Case prevents blade tangling or loss .
  Cons:
• No ergonomic handle (requires careful handling to avoid cuts) .
• Blades can scratch if forced into tight gaps .
• Metric range skips 0.55mm (use 0.53mm + 0.02mm combo) .

5. Comparison vs. Competitors

Feature	Mutt Tools	Tekton	Generic Amazon Set
Blade Count	32	25	20
Angled Gauge	Yes	No	No
Marking Durability	Laser-etched	Stamped	Stamped (wears off)
Case Quality	Hard protective case	Pouch	Flimsy pouch

6. Who Is This For?

• DIY Mechanics: Home garage enthusiasts maintaining cars or motorcycles .
• Professional Technicians: Needs inch/metric versatility for diverse vehicles .
• Musicians: Guitar/bass players setting instrument action heights .
• Small Engine Repair: Lawnmower, chainsaw, or generator maintenance .

7. How to Use for Valve Adjustments

1. Identify Clearance Specs: Refer to your vehicle’s manual (e.g., 0.010″ intake/0.012″ exhaust) .
2. Select Blades: Combine straight/angled gauges to match specs .
3. Insert Gauge: Slide into valve rocker gap until slight resistance is felt .
4. Adjust as Needed: Tighten/loosen rocker arm until gauge fits snugly .

8. Final Verdict: Worth Buying?

Priced under $25, the Mutt Tools set delivers exceptional value for its precision, versatility, and durability. While it lacks an ergonomic handle, its laser-etched markings and angled design outperform similarly priced competitors. For anyone tackling valve adjustments, spark plug gaps, or precision instrument work, this kit is a worthy investment .

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FAQ Section

Q1: Does this work for Harley-Davidson valve adjustments?
Yes! Use the angled gauge for easier access to pushrod-style engines .

Q2: Are the markings really permanent?
Laser-etching won’t rub off like stamped markings, even with solvent exposure .

Q3: Can I use this for diesel engines?
Absolutely—ideal for measuring injector plunger gaps or valve clearances .

Q4: What if a blade breaks or wears out?
Contact Mutt Tools for replacement blades under their warranty program .