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Quantity
1
Instant Bolt Size Identification
Our Bolt Size Finder gauge lets you identify any bolt or nut size instantly, saving you time and effort. No more testing different sockets to find the right size—our tool makes the process simple and easy...
Reviews
4.7
483 ratings
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These come in real handy when you are getting ready to work on something. It's a lot easier to just check the size real quick instead of packing a handful of sockets or wrenches with you to do a job.
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Brad · May 25, 2026
Love this little gadget. Makes finding the right size socket or wrench a breeze. I work in an auto repair shop and the "combo years" in the late '80's/early '90's where half the fasteners could be metric or SAE, this little tool makes getting the right tool easy to find. Also helps identifying rounded fastners. I am very pleased with this purchase.
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Darwin · April 19, 2026
Have you seen a few times and it saved me for going back to tools