Pentel® Flexfit Auto Pencil Pencils feature Pentel's exclusive, revolutionary Lead Maximizer system, which automatically feeds lead into the sleeve for continuous writing and greater lead usage. Maximizer technology means fewer jams and less lead breakage. The dual-action retractable mechanism protects the pencil tip. Grid-like pattern on the rubber grip creates a comfortable no-slip surface, yet it yields to fingertips for writing comfort. Refillable. Uses Pentel's Super Hi-Polymer lead and Z2-1 refill eraser.