These are intended to anchor the guys for our Zip-Line (among other things):
Unlike traditional stakes, they advise these to be used in-line with the cable in tension.

These 46" penetrators are big mothers! I think I'll go with the "PE46Guy" version.

To be honest, these could use some hand filing, polishing and why not a red anodize?

Big Red! They're made from aluminum 356, which has enough Silicon to create dark blotching. I think the polishing may have helped a lot, because these came out nicely!

Now I'm starting to get interested in the hand-cranked 9" little guys. Screw All The Things!
Also, now I have to get a Makita TW1000. 748 ft-lbs never felt so good! (video from AEA)