The Gear Graph 500 Pentel mechanical drafting pencils are weighted at your fingertips for precise drawing control. Their Metallic mesh grip attached to a slim, beveled barrel is easily held when writing. The 4mm tip makes them ideal for use with rulers and templates. The Gear Graph 500s are pre-loaded with strong Pentel super hi-polymer HB lead that never needs sharpening and produces uniform clear dark lines. They are available in tip sizes: 0.3mm, 0.5mm, 0.7mm, 0.9mm