Technical Data - Welding Clamps - Customs by Ripper
UPDATE: Save yourself the time and energy. Harbor Freight sells these for $2.00 for a package of 4.
Honestly, I cannot take credit for this idea. I found it on the internet. I forget where.
If anyone knows the source, feel free to let me know and I will give them the proper credit. Thanks.
All you need is some 1" square tubing, some 5/16"s bolts and nuts, some thin steel sheet and some nails.
Cut the square tubing into sections around an inch long.
Drill a 5/16th's hole straight through.
Hacksaw through one of the holes going parallel with the opening in the tubing.
Cut the heads off of all the bolts.
Cut the steel sheet into about 3/4" by 3/4" pieces.
Punch a hole in one end of the steel sheet.
Weld it to the end of the bolt where the head used to be.
Cut the head off of the nail, cut the nail in half.