This "Thumbholder" lead holder from Maruzen Art weighs a substantial 50 grams and contains a soft 6B 5.8 mm lead, allowing you to maintain a light grip (thus avoiding strain) yet still experience a stable drawing feel. Use it for many purposes including rough sketching and design sketching. To sharpen the lead, unscrew the cap and use it as a sharpener. One lead is included, and refills are available.
Dimensions: 4.6 inches long, 0.6 inches diameter (11.8 cm long, 1.5 cm diameter).