角度規塊，0–60 度，1" x 1-1/4" x 3"

Set the angle with the vernier scale and it locks rock-solid—squareness within 0.0002" is no joke. Used it to set up a drill press table this morning and the 10-arcminute accuracy gave me dead-on holes without any fiddling.

The hardness rating of 50-55 HRC gives me confidence this block will hold its edge for years, and the squareness to -0.0002" has already made my drilling setups noticeably more accurate. I've used it for a few milling jobs now and the angle holds steady through the cut.

I was a little worried about the accuracy of a low-cost block, but the stated ±10 arc-minute tolerance is clearly real—it squared up my milling vise perfectly.