JNB Pro Retractable Utility Knife – Heavy-Duty 18mm Box Cutter with Auto-Retractable Blade The JNB Pro Retractable Utility Knife is designed for professionals who need precision, durability, and safety on every cut. Featuring an 18mm snap-off blade, rugged zinc alloy body, ergonomic TPR rubber grip, and push-button auto-retractable mechanism, this knife is ideal for demanding construction sites, warehouses, workshops, and everyday cutting tasks. The retractable blade offers improved safety when not in use, while the snap-off blade design allows you to quickly expose a fresh, sharp cutting edge without replacing the entire blade. Its heavy-duty construction and comfortable non-slip grip provide excellent control and long-lasting performance. Perfect for contractors, painters, drywall installers, flooring professionals, warehouse workers, and DIY enthusiasts. Features Heavy-duty zinc alloy body 18mm snap-off carbon steel blade Auto-retractable push-button mechanism Ergonomic TPR rubber non-slip grip Durable steel blade guide Lightweight and comfortable for daily use Built for professional and DIY applications Suitable for standard 18mm snap-off blades