NT Cutter 18mm Snap-Off Blades — 50-Blade Pack, Heavy-Duty Extra-Sharp Black 58°

NT Cutter BL-51P are 18mm heavy-duty black snap-off blades built from high-carbon tool steel for extra-sharp performance and durable edge retention.

These professional-grade snap-off blades deliver a finer cutting edge and longer-lasting sharpness thanks to multi-stage manufacturing and an intensified finishing process. Sold as a 50-blade pack in a protective plastic case with a hanging hole, the blades are sized for standard 18mm utility knives and designed for demanding tasks across construction, industrial, and workshop environments. Made in Japan, they prioritize precise cuts on tough materials while remaining compact and easy to store.

How do these blades perform on heavy materials?

The BL-51P blades are engineered for robust cutting tasks—cardboard, linoleum, roofing materials, carpet, and thin veneers cut cleanly when using these carbon tool-steel blades. Their 58° edge geometry and refined finish give a sharper, more consistent slice for repeated heavy use.

• Material compatibility: cardboard, rubber, leather, corkboard, acetates, linoleum, carpet, thin veneer, form board
• Blade dimensions: 18mm W × 100mm L × 0.50mm T for stability and control
• 58° angle for a balance of sharpness and durability
• High-carbon tool steel for improved edge retention under load

What makes these blades different from regular snap-off blades?

Unlike standard disposable blades, these undergo additional finishing steps to refine the cutting edge, producing an extra-sharp profile aimed at professional use. The black coating and precise honing help reduce friction and maintain a reliable edge through repetitive cuts.

• Extra finishing stages deliver a finer edge than typical blades
• Black finish reduces drag and improves cutting feel
• Produced in Japan with strict quality control
• Pack of 50 blades for extended on-site readiness

How do I store and swap these blades safely?

The pack comes in a moulded plastic container with a hanging hole for secure storage and quick access. When changing blades, retract the knife bar, snap off dull segments on a safe surface, and follow your utility knife’s recommended replacement steps to minimize risk.

• Protective plastic case prevents accidental contact and keeps blades aligned
• Hanging hole for workshop or pegboard storage
• Snap-off segments let you refresh the cutting tip without replacing the whole blade
• Recommended: use gloves and eye protection when snapping or installing blades

Which tools and jobs are these blades best paired with?

These 18mm blades are compatible with most heavy-duty snap-off utility knives that accept 18mm widths. They excel on construction sites, flooring installation, packaging and warehouse cutting, and precision workshop tasks that demand a sharper, longer-lasting edge.

• Compatible with standard 18mm snap-off utility knives
• Ideal for drywall, roofing, flooring, industrial trimming, and packaging
• Pack size supports frequent blade changes without downtime
• Recommended for professionals who require consistent, high-quality cuts

Who is this for: NT Cutter BL-51P blades are intended for tradespeople, contractors, installers, and industrial teams who need a reliable, extremely sharp snap-off blade that holds up under demanding conditions. They suit professionals and experienced DIYers who understand safe blade handling and want longer edge life and cleaner cuts on dense or abrasive materials.