The Pentel graph gear 800 Mechanical drafting Pencil features a 4mm tip that is ideal for use with rulers and templates. The metal grip is inlaid with soft, latex-free pads for a durable and comfortable writing experience. The adjustable metal clip withstands repeated use and an eraser cap keeps your eraser clean. Each graph gear 800 is color coded for quick lead size identification: 0.3mm (Brown), 0.5mm (black), 0.7mm (Blue) and 0.9mm (Yellow). pre-loaded with Pentel super Hi-Polymer HB lead; lead never needs sharpening, is super strong and produces a clear dark line. The Pencil is backed by pentel's limited lifetime warranty.