Equipped with Delgard system that does not break the core Protects the core from all directions Upper spring absorbs pen pressure The core escapes upward to prevent breakage The lower spring absorbs the writing pressure The tip pops out and guards the core. Removable protective cap to reveal a mini eraser Write with wipe, convenient, practical and cover protection. Low Centre of gravity design and lengthen nib design to make the centre of gravity long lasting. Press the button to bring out the pencil lead and long press to extend or retract. Refillable