Description
Product Overview
The HARFINGTON 5‑piece feeler gauge set is engineered to deliver exacting measurements for a broad spectrum of industrial and scientific tasks. Each blade measures a thickness of 0.3 mm, providing a fine resolution that is essential when working with tight tolerances in mechanical assemblies. Crafted from high‑grade SK4 65MN steel, the blades exhibit superior anti‑rust properties, wear resistance, and flexibility, ensuring they maintain their shape and accuracy even after repeated use in demanding environments. The blade width of 10 mm and length of 100 mm are optimized for comfortable handling, allowing technicians to insert the gauge into narrow gaps without compromising stability. Laser‑etched markings on each leaf guarantee permanent, fade‑free identification, eliminating the need for frequent recalibration or replacement. This set is packaged in a compact, lightweight box measuring 3.54 × 2.44 × 1.77 inches and weighing just 2.4 ounces, making it easy to transport to job sites, workshops, or field locations. With a best‑seller rank of #53 in the Feeler Gauges category and a perfect 5‑star rating from verified customers, the HARFINGTON gauge set has earned a reputation for reliability and precision among professionals who demand consistent performance.
![[Product front view showing all components]](https://www.focalshop.store/wp-content/uploads/2026/07/79c5edebc4824ba39f412a52d157f0ea.jpg)
Usage
Designed for engineers, mechanics, designers, and technicians, this gauge set excels in a variety of real‑world applications. Whether you are checking the clearance of tappet bearings, measuring spark plug gaps, verifying piston ring clearances, or inspecting bearing fits, the 0.3 mm blades provide the granularity needed to detect even the smallest deviations. The anti‑rust 65MN steel construction ensures the gauges resist corrosion when used in humid or oily environments, such as automotive repair shops, aerospace maintenance bays, or manufacturing floors. The lightweight design allows for prolonged use without fatigue, and the laser‑etched markings enable quick identification of the correct blade, reducing downtime during critical inspections. Additionally, the set is suitable for educational settings, where students learning about precision measurement can benefit from a durable, easy‑to‑use tool that demonstrates industry‑standard accuracy. By integrating this gauge set into routine maintenance schedules, organizations can improve equipment reliability, extend component life, and prevent costly failures caused by improper clearances.
Why Choose Us
Choosing the HARFINGTON feeler gauge set means investing in a product that combines material excellence, thoughtful design, and a commitment to customer satisfaction. The SK4 65MN steel used in each blade is sourced from reputable suppliers and undergoes rigorous quality control to meet exacting standards for hardness, flexibility, and corrosion resistance. This material choice not only enhances durability but also ensures the gauge maintains its calibrated dimensions over time, providing confidence in every measurement. Our laser‑etching process utilizes high‑precision equipment to imprint clear, permanent markings on each leaf, eliminating the risk of fading or wear that can compromise readability. Beyond the physical product, HARFINGTON offers responsive after‑sales support, including technical assistance, warranty coverage, and a dedicated customer service team ready to address any concerns. We understand that precision tools are critical to your workflow, and we stand behind our gauges with a guarantee of performance and reliability. By selecting HARFINGTON, you align with a brand that prioritizes quality, innovation, and the success of its users.
Key Features
- Ultra‑fine 0.3 mm measurement resolution for high‑precision gap checking.
- Durable SK4 65MN steel construction resists rust, wear, and deformation.
- Laser‑etched markings stay legible for the life of the tool, reducing re‑calibration needs.
- Ergonomic 10 mm width and 100 mm length provide comfortable handling in tight spaces.
- Comprehensive after‑sales support and warranty ensure long‑term confidence.
FAQ
What is the measurement range of each blade?
Each blade in the set is calibrated to a fixed thickness of 0.3 mm, making it ideal for detecting very small clearances and gaps in mechanical components.
Can the gauge be used on non‑metallic surfaces?
Yes, the thin, flexible blades can safely measure gaps in plastic, composite, and other non‑metallic materials without causing damage, provided the surface is clean and free of debris.
How does the laser‑etched marking improve usability?
The laser‑etched numbers are permanently engraved on each leaf, ensuring they remain visible even after extensive use, exposure to oils, or cleaning solvents, which helps users quickly select the correct blade.
Is there a warranty or guarantee for this product?
HARFINGTON offers a one‑year limited warranty covering manufacturing defects, and our customer service team is available to assist with any issues or questions you may have.
What applications are best suited for this gauge set?
The set excels in automotive maintenance (spark plug gaps, piston ring clearances), industrial equipment inspection (bearing fits, shaft tolerances), and precision engineering tasks where accurate gap measurement is critical.





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