I've seen similar tools made of plastic on the market but I decided to make my own from aluminum. It contains (1) exacto blade the can be set from 1/16" to 1" in width. Blade can be set straight up/down as shown or can be tipped back if desired. (can be placed facing either way depending on if you left or right handed)
This tool has many uses such as trimming thin long strips of paper, cardboard, vinyl type material, plastic and even tape right on the roll!
Made in the USA from my personal scrap bin.