NT Cutter 18mm Heavy-duty Ex tra-Sharp Black Snap-Off Blades, 50-Blade/Pack, 1 Pack (BL-51P) Heavy duty snap-off blades 18mm W x 100mm L x 0.50mm T Black 58 degree Made of high quality carbon tool steel Cutting material: Cardboard, rubber, leather, corkboard, acetates, linoleum, carpet, thin veneer,form board, etc. 50ea per pack Made in Japan