Upgrade 70 Nut and Bolt Thread Checker - Magnetic Base Thread Gauge

In this review the Upgrade 70 Nut and Bolt Thread Checker is evaluated for mechanics, hobbyists, and shop technicians who need a single compact tool to identify bolts, nuts and drill bits quickly. The standout reason to buy is the combination of a strong magnetic base with a comprehensive set of thread sizes - 26 metric and 26 standard sizes plus 18 drill bit gauges - which turns a common guessing task into a fast, repeatable check. The review focuses on build quality, marking clarity and day-to-day usefulness in a workshop.

Key Features

• Magnetic base: Four built-in magnets keep the gauge attached to metal surfaces for hands-free access and stable checking.
• 52 thread sizes: The combined 26 metric and 26 standard thread slots cover common M2-M24 and 2-56 to 1-12 sizes, reducing the need for multiple gauges.
• Drill bit and ruler: Eighteen drill bit gauges plus 15 cm and 6 in rulers let users measure bits, bolts and nails without switching tools.
• Durable materials: CNC-machined anodized aluminum alloy and US 304 stainless steel bolts provide a professional feel and wear resistance for frequent use.
• Laser-etched markings: Clear, permanent markings make matching pitch and size straightforward under workshop lighting.
• Portable layout: Mounting holes and eight spare silicone feet allow wall hanging or flat placement without scratching work surfaces.

Who It's For

The gauge is well suited to professional mechanics, maintenance technicians and serious DIYers who regularly work with mixed imperial and metric hardware and want a durable, all-in-one identification tool. The strong magnetic base makes it useful in a shop where attaching the gauge to a toolbox or metal bench speeds access.

Less suitable for occasional users who only need a single system of sizes, or for applications that require thread measurement to micro-level tolerances. If precise thread form measurement or go/no-go gauging is required, a dedicated thread micrometer or plug gage would be more appropriate.

Pros & Cons

Pros

• Comprehensive coverage of both metric and standard threads in one compact tool.
• Strong integrated magnets and mounting holes give flexible storage and hands-free use.
• Robust CNC-machined aluminum and stainless steel construction stands up to shop use.
• Laser-etched markings and built-in rulers speed identification tasks.

Cons

• Not a substitute for precision thread measuring instruments when exact tolerances are required.
• The tool focuses on identification rather than go/no-go verification, so further checking may be needed for critical assemblies.

Specifications

Included thread sizes	26 metric and 26 standard sizes
Metric range	M2 x 0.4 to M24 x 3.0
Standard range	2-56 Coarse to 1-12 Fine
Drill bit gauges	18 sizes including 3,4,5,6,7,8,10,12,14 and common fractional sizes
Material	CNC-machined anodized aluminum alloy and US 304 stainless steel bolts
Rulers	15 cm and 6 in on opposing sides
Extras	Built-in magnets, mounting holes and 8 spare non-slip silicone feet

Our Verdict

The Upgrade 70 Thread Checker is a practical, value-minded tool for anyone who sorts mixed hardware in a workshop. Its strong magnetic base, durable construction and full set of metric and standard sizes make routine identification fast and reliable. It is a smart buy for professionals and frequent DIY users who want to stop guessing sizes, though those needing laboratory-grade measurement should pair it with precision instruments.

Frequently Asked Questions

Can I attach this gauge to a metal toolbox?
Yes, the built-in magnets securely fasten the gauge to metal surfaces for hands-free use.

Does it include both metric and imperial measurements?
Yes, it contains 26 metric sizes, 26 standard sizes and both 15 cm and 6 in rulers for measurement.

Is this suitable for precision thread inspection?
It is designed for quick identification and measurement; for precise tolerance verification use a dedicated thread micrometer or plug gage.