The Pencil Grip Heavyweight Pencil Weighted Ergonomic Mechanical Pencil with Pencil Grip (TPG-652) Developed by doctors Great for Adults & Children, Righties & Lefties Improves legibility, prevents writers cramp, builds strength, and decreases hand tremors The Arthritis Foundation recommends the unique ergonomic grip - 2.0 mm lead Weighs approximately 4 oz. (113 grams)