Why doesn't the metric include 18mm?

Did not notice ! But am very disappointed that the 18mm sizes are missing from the metric ser as well as the 7/8 sizes are missing from the SAE/inch setcolete sets. I plan to call Thread Checker on it.

18mm and 7/8 sizes are not included? Can the seller/maker explain that & do you have another set which includes them?

I've been talking with the company requesting additional checkers to add to the ring. The ones that are skipped are: M18-2.5, M14-1.25, 7/8"-9, 7/8"-14, and #8-36 sizes. Technical support told me they will pass this info "up the ladder", so I'm hopeful. These last few checkers would make this the PERFECT set.

Why is #12-24 also missing?

Your right it is not included. That size is not available either.

how do they detach from the cable so you can check things like holes on the side of an engine block if you don't want to stick the chain down there?

I used split ring key chains to attach to each gauge and then added all to large split ring. 5/8" for small gauges, 7/8" for large size. then added to either a 2" for a Metric- S.A.E. or for one ring combined I used a 3" split ring. This is a way that each gauge can be removed and returned when needed. Enjoy!

Nut And Bolt Thread Checker Complete Sae Inch And Metric

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Check it, don’t wreck it! The ultimate thread checker for the savvy professional.

BUILT TO LAST - Durable construction ensures longevity and reliability for all your projects.
USER FRIENDLY - Permanently stamped sizes eliminate guesswork and enhance efficiency.
COMPACT DESIGN - Lightweight at just 2.55 lbs, perfect for on-the-go professionals.
VERSATILE TOOL - Ideal for mechanics, engineers, and DIY enthusiasts alike.
PRECISION MEETS CONVENIENCE - Easily identify 23 SAE and 21 Metric thread sizes with dual-check gauges.

The Nut and Bolt Thread Checker set includes 23 common SAE and 21 metric sizes, each with a dual-check gauge for easy identification. Designed for durability and efficiency, this compact tool is perfect for professionals and DIY enthusiasts who demand precision in their projects.

Specifications

ASIN	B06ZYD4SS8
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#265,185 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #974 in Nut & Bolt Assortment Sets
Color	Original Version
Customer Reviews	4.7 4.7 out of 5 stars (1,321)
Date First Available	April 14, 2017
Included Components	Two sets of thread checkers
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	2.55 pounds
Item model number	SWTC-M21
Manufacturer	Thread Checker
Number Of Pieces	2
Package Dimensions	7.83 x 6.89 x 2.8 inches
Part Number	SWTC-M21
Size	One Size

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