/diy/ - Do It Yourself

Bought this at a yard sale earlier this year. It has Mi-Spreader cast into the handle, but other than that there is no information on it. I tried googling it, but haven't come up with anything even remotely close just using "Mi-spreader" as the search term. Looks like the arms would fit over 2x boards or something similar and when you fully depress the arm it over centers into the locked position. It did have a label on it where a lock pin would go that warns you to not work around it when spreading (whatever the hell it is supposed to spread) without having the lock pin in place.