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

Perfectly square, nice weight, align perfectly! They are coated/covered in rust inhibitor but easily removed (I used engine degreaser (works great by the way))

Works as advertised . Basic 123 blocks. Used for set ups in machine shop.

Checked the size against gage blocks and they are dead on. No more than a tenth deviation across the whole face. Another great product from WEN.

With my equipment I measure them to be nominal +/-0.0005in

Solid metal and accurate

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.)

Holes in the blocks are threaded and I love the weight in hand. Such a convenient and useful piece of steel.

I put a digital caliper to these and they measured out exactly 3x2x1!!! Surprised the hell out of me for the money....

If you craft you need a boat load of these. They keep surfaces together while gluing. The keep things from rolling up, They are the perfect size. the weight of a heavy book in a smaller size And the holes are spaced so you can put a dowel thru them and create other temporary structures on hang from.

Works as expected