●Ease of Use - Extended, needle-nose tip for tight and hard to reach areas. 1-Click advance for just the right amount of lead dispensed. ●Refillable - Stainless steel lead feed tube for easy refilling and continued use - diameter of lead 2.8mm. Works with all OX Tuff Carbon marking range leads. ●Sharpener Built In - Integrated lead sharpener built into the cap of the holder to ensure ease of use and precise marks. ●Three Colors – Pack includes 3 Red Leads, 3 Blue Leads, and 4 White Leads. ●Carrying Case – Leads come in a compact case.