Gedess Lead Pointer - Thick Leads to 3.15mm. Grey Body Gedess sharpener rings also available. The Gedess sharpener accommodates the tip of your lead holder (up to about 8.6MM), from which you have ejected It will sharpen leads up to 3.15mm in diameter. About 1/5" (for colored leads) - to 2/5" (for graphite leads) of lead.