This sharpener case is made for use with the Tiger Pencil Sharpener (P442) but also fits on the old Boston KS 1041 pencil sharpeners. The unit is designed to fit over the sharpener cutter and lock into position, holding all of the pencil shavings securely into place. Featuring a rotating guide with eight width settings to sharpen nearly any size pencil. Unit is constructed out of aluminum for a lightweight, yet durable, pencil shaving storage solution.