Our Lipstick Crayon's require sharpening to keep the lead primed, this sharpener is ideal for that job. We've made a conscious decision to create a lipstick crayon that is made from renewable resources hence why we have a plain wooden and not plastic casing that needs sharpening. We know it takes little more work to maintain but we think looking after our lips and the environment is important.  If you already have a 10.5mm sharpener suitable for soft leads then please don't buy this one.  Use to keep your Luk Beautifood Crayons sharp (10.5mm) Sharpens both small and large diameter pencils Twin blade Clear lid to catch residue shavings PCR sharpener is in the works!