NT Cutter Heavy-Duty Aluminum Die-Cast Anti-Slip Contoured Grip Screw-Lock Utility Knife (L-550GP) Heavy duty snap off blade utility knife Aluminum die-cast anti-slip contoured grip / Electrical-acrylic metal coated / Made of recycled materials Blade Size: 18mm Screw-Lock system Stainless steel blade-sliding-track / With built-in blade snapper Replacement blade: BL-150P, BL-10P or BL-50P (BL-51P, BL-3000-ON, BSL-11P, BSL-21P and SAW-5P are also applicable) Cutting material: Cardboard, rubber, leather, corkboard, acetates, linoleum, carpet, thin veneer,foam board, etc. Made in Japan