it is a simple holder for a roll of flagging tape.
very useful to hold your tape roll as you walk into the woods, clearing a path and marking trees. you simply need a length of cord and a carabinner to fasten in onto your backpack or something.
made for a roll of about 29mm wide and 44mm diameter hole, there is some space between the holder and the roll so anything around this dimension will fit.
The author marked this model as their own original creation.