Tombow Mono Graph Shaker Transparent Mechanical Pencil 0.7mm

Features: 

• Its shaker mechanism lets you extend the lead with a simple shake up and down. To prevent the lead from extending in your pocket or pencil case, you can lock the shaker mechanism by pushing up on the clip.
• The clip also acts as a conventional click mechanism, letting you extend the lead by pushing down on it.
• A transparent gray grip area lets you see the pencil's inner workings.
• A long guide pipe gives you a better view of where you're writing or drawing.
• The popular Tombow Mono eraser is installed at the top with a convenient twist mechanism and usable length of approximately 0.7 inches (1.8 cm).