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Thread Size Checker Keychain
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Shipping & Returns
Standard shipping takes 7-10 days to arrive. Expedited shipping takes 3-5 days to arrive.
We guarantee a free return and refund within 30 days if you are not satisfied.
Fast and Accurate Thread Keychain, Versatile Applications
This thread size checker keychain is designed for fast and accurate thread size verification, saving you time and effort on the job. Whether you're working on automotive, home improvement, or mechanical tasks, this thread gauge can provide reliable size verification for a variety of bolt and nut types.
Various Advantageous Features

Portable Keychain Design
Easily attach this bolt size checker to your keys or belt loop, ensuring it's always within reach when you need it, making it a handy tool for professionals and DIY enthusiasts.

Convenient Dual Unit Markings
- The bolt and nut identification gauge features both metric and imperial measurements, offering versatility and convenience.
- Comes with clear engraved markings to ensure easy and error-free size identification.

Rugged and Durable Construction
Made of high-quality materials, it can withstand frequent use and harsh conditions, ensuring long-lasting performance, making it a valuable assistant in various industries.