NT Refill blades for mat board cutter MAT-45P, is designed for cutting 45 degree angle bevel straight edge on mat boards. Ideal for making decorative frames or architectural models where bevel edges can be joined together. This convenient and economical blade has four cutting edges so when its time to change the blade, simply turn it to an unused side. High quality mat blades are made of chromium and tungsten added carbon tool steel for higher abrasion resistance and produced through multiple stages of precise process to obtain the ultimate sharpness and optimum edge-retention. Good to make decorative frames for pictures and photos, to make architectural models, and to frame artwork, etc. 2 blades / pack. Good to make decorative frames for pictures and photos, to make architectural models, and to frame artwork, etc. Made in Japan.