I cannot recommend these matrices. I cut about 2 inches of thread, never twisting more than 1/8 turn, and then snap off the shavings. I was very tender, but that wasn't enough.
3/4-10 post threading die shipped and arrived very late. Dispatched in a small dirty postal envelope. The price for this was lower than I have ever bought a tap or die. Appears to be of good quality. I had to cut a rough thread on a tool. Per.
Pros
Package dimensions: 1.524cm (L) x 7.36cm (W) x 9.398cm (H)