WEN 10423 3 x 2 x 1-Inch Steel-Hardened Precision 123 Blocks, Two Pack

They do what theyre supposed to. A 3/8 16tpi bolt threads easily but will NOT pass through the untapped holes (this is a correct design.)

I was hesitant to buy these since the price was lower than others. I was pleasantly surprised to find that these 1-2-3 blocks measure perfectly on my calipers. Highly recommended!

Have had a set of these for over 30 years. Bought this set, its really nice to have a second set.

So many makers swear by these. Who am I to say otherwise?

woodwowking shop

Once I cleaned off all the oil from shipping the calipers show me the measurements were over/under by 0.02mm. Very happy all sides were also SQUARE and flat. No dented corners or sides.

Nice

Before opening the box you can smell it. Smells like fuel. Its almost like vaseline consistency. A little googling and I find out its called Cosmoline. Makes sense that they want to ship it protected from rust but this stuff is a bit much.

No dislikes. Impressed with the quality.

A+++