This is a Bandai 5062003 Spirits Model Sanding Stick Set

This set of stick files gives you different degrees of roughness, plus a convenient size that allows you to smooth out large areas on your model kits! Their moderate flexibility makes them incredibly versatile, and you get three types of roughness: #400, #600 and #1000, to meet all your modeling needs. You get one file each of the three types, for a total of three files.