1. As you write, the lead sleeve retracts as the lead wears down.
2. An Automatic lead advancement system extends the lead everytime you lift the pencil from the page
3. Once the pencil is writing, you never have to click the top button again until the lead runs out!
4. A Special resin-metal blend gives the nero a reassuringly sturdy feel and a comfortable weight that is neither too heavy nor too light.
