Zebra Delguard 0.7 mm Unbreakable Nib Versatil Pen Green

Delguard uses an ingenious two-part system that makes it almost impossible to break the bullet.

first, a spring in the lead barrel allows the lead to slide back into the pencil instead of breaking if too much vertical pressure is applied.

second, another spring at the end dynamically expands the bullet guard to protect the bullet when too much side pressure is appliedsize : 13.7 cm weight : 10 gr