Quality - Constructed from the highest quality pp/abs/stainless steel materials to ensure long life withstanding all jobsite conditions. | Ease of Use - Extended, needle-nose tip for tight and hard to reach areas. | Accuracy - 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. | Accepts 2.8mm replacement leads