SO you bought a graphite pencil brand that is a little thicker than your regular pencil sharpener? Here is the best adjustable size pencil sharpener I've found. I use this to sharpen my caran d'ache and mitsubishi hi-uni pencils. There are a few challenges with this sharpener though, it isn't perfect. Check it out to see what I like and don't like about this tool. Let me know if you find a better adjustable size manual pencil sharpener, too, please!