K40 Card Engraving Jig and Focus Tower

I made this to help me make a repeatable way to place my laser engravable business cards and other square or rectangular stock.

The 7mm slots are designed to allow me to use a bolt, nut and fender washer combo to securely attach the jig to my expanded metal table. The bolt can be threaded through the top with a fender washer and nut underneath. The fender washer will keep the nut from puling through the expanded metal.

Once set up and ajusted, I can quickly and easily drop in a metal eng