4 Pack Box Cutters, Snap Retractable Safety Utility Knives with 10 Spare blads

• Multi-purpose for cardboard, paper, wire cutting, PVC, delicate fabrics, crafts. 
• Easy Change for new replacement blade without other tools:

How to replace:

• 1. Remove the tail cap
• 2. Take out the blade
• 3. Replace with a new blade 4. Finished
• Auto lock slider to adjust and lock the blade position, ensure safe and stable work.