Multipurpose book strap Porter Bookstrap

The use of Porter Bookstrap is a bit like tying old books and newspapers to be sold on the street with a rope, and there is even a pen case for you to hold your pen, using it will no longer happen in a hurry to get hit, the book fell on the ground, and the opportunity to flirt with handsome men and beautiful women will be greatly reduced, the movie is not all that!