This item is an item of stationery (paper or writing goods), or other small merchandise such as good-luck charms, mascot straps, et cetera. It does not require either cement or paint to complete or use.
Here's a great set for fans of "Little Busters! Ecstasy" that features a plastic strap and a metal dangle apiece of Kudryavka Koumi, Rin Natsume, and Yuiko Kurugaya. Pick the metal dangle(s) of your favorite girl(s) to add to the plastic strap, and then attach it to your mobile phone to accompany you wherever you go!
Also check out the other set, linked below, with three more girls to add to your company!
