BusyBee has a current sale price on their 1-2-3 Blocks.
Multiple threaded holes, dimensions ground to 0.0001”.
The sale flyer stated $23.99/set dated Nov.7, 2022.
That's because they are below $35 threshold minimum for free shipping, the one time free is to get you in or you don't have prime.I just love the way Amazon says "free shipping WITH FIRST ORDER" which in my case means $6.97 for shipping or an extra 30% on the 123 blocks!
The chances that either manufacturer is actually getting us tenths precision at $24 is pretty much nil. You could also order a dozen from each and they will all be out a little bit from each other. At these price levels and import stuff, I would never assume anything is bang on accurate to their stated numbers anyway.The WEN blocks on Amazon don't specify precision.
Busy Bee at least "CLAIMS" 0.0001 per inch. But it doesn't say what that really means. I assume it means the 1" side is 1.0000 +/- 0.0001 and the 3" side is 3.0000 +/- 0.0003. So you could end up getting a pair that varied by a half thou between each other.
The Amazon WEN blocks do not have specs at all so - your mileage may vary!