I made this bad boy a few years ago in the weld shop. 7x3 beveled blade 3/16 steel, 7in hollow aluminum handle with a rubber grip. I put a nice little extension on the top of the blade to give it a nice push into the soil. This thing will never break or bend.
MineLab E-Trac, MineLab Safari, MineLab Explorer XS,
White's 5000 D, White's 6DB, White's 5000 D GEB
Sunray X-1 for the ML's, Garrett PP for the White's and a Backhoe