Thank you for viewing. This is NT CUTTER replacement blades (black blades). I purchased a pack of 100 blades for about 2700 yen. I have used 5 blades, so there are 95 remaining. Brand: NT Cutter Part number: BD-2000 (black blade) Product type: Replacement blade BD-2000 (made of iron) 100 blades Size (mm): 51 x 108 x 23 Weight (g): 199 Blade length 72 mm Material: Metal Weight: 203.5g Style: Black blade (100 blades) Blade material: Material (blade) SK2 Specification: Professional BD type replacement blade, 30° Number of replacement blades: Design D30° continuous black blade (blade thickness 0.38mm) Contents: 1 box (100 blades) Style: Cutter Handle type: Non-retractable Compatible bodies/compatible replacement blades: D-300P, D-400, D-400P, D-401P, eD-400, D-400GP, D-500GP, SW-600GP, DS-800P, D-1000P Dedicated blade breaker: BDS-100P (included) for breaking and using continuous blades Color: Black Packaging: Poly case NT Cutter blades provide a new sharpness with blade replacement. Suitable for office work and light tasks. Design knife replacement blades for delicate cutting. 9 design blades (30°) are connected to one blade. Please break off and use one blade at a time.