Zebra DelGuard 0.5mm

DelGuard is a mechanical pencil line developed by Zebra. It features a special patented mechanism that protects the lead from breakage caused by both vertical pressure and angled pressure. The DelGuard system keeps the lead protected even when you apply a lot of pressure while writing or drawing, making these pencils last for a long time before they need to be replaced. Lead may break when:  Retracting more than three times from initial use.  Using softer lead (e.g. 3B, 4B, and/or Colored lead)