Clips to binders. Perfect for general writing. No-slip grip. Double click action. Click to advance lead and tip. Click again to retract lead and tip. Convenient retractable mechanism protects pencil tip. Features Pentel's exclusive Lead Maximizer technology for less lead jams and breakage. Ultra-soft rubber grip with grid-like pattern creates a no-slip grip for superior comfort. Refillable--uses Pentel's Super Hi-Polymer Lead and Z21BP-K6 refill eraser. Made in Japan.