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 Complete Sae Inch And Metric Set Packs

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Rp4376053

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

23 of the most common SAE and 21 of the most common metric sizes, see description
Each included size has a nut and bolt checker on the same gauge.
Thread sizes are permanently stamped on each gauge.

Nut and Bolt Thread Checker (Complete SAE/Inch and Metric Set) (Packs)

Specifications

ASIN	B06ZYD4SS8
Best Sellers Rank	#168,074 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #666 in Hardware Nuts & Bolts
Item model number	SWTC-M21
Manufacturer	Thread Checker
Package Dimensions	19.89 x 17.5 x 7.11 cm; 1.16 kg

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