I turn a Nut into a tiny Adjustable Wrench

In this video I turn a stainless steel M20 nut into a small adjustable wrench. All three parts are made entirely from a single nut. First I turned the thread and the hexagon on the lathe. After cutting a slot in it, I was able to open it with the help of a torch. After a few heats I had a very flat and flat piece of stainless steel. First I went to the milling machine and milled the whole piece to the final width of the key. Then I cut a piece with a hacksaw to remove the body. With a small t-slot end mill I was able to mill the t-slot very nicely with a very low feed rate and a lot of oil. After milling the square hole and drilling the 2.1 mm deep hole, I started shaping the outer contour. I then proceeded to make the movable part of the key. I milled it all in one operation with very careful steps so as not to risk it and to avoid chatter marks or anything. After round filing the square end, I sanded the rectangular part until it fit snugly against the body. I then cut the M2 thread and cut the part with a hacksaw, joined it to the body and sanded both parts flush. I then started rounding all the edges with needle files, sandpaper and finished with very fine steel wool for a brushed finish. Now all that remained was to make the knurled adjusting nut.