Made from high grade carbide steel rods, Siser blades are polished to razor sharp perfection for precise cutting. Compatible with the Siser Blade Holder, 60 Degree Deep Cut Blades click in simply thanks to the housing's inner magnet. The Deep Cut Blade allows your cutter to easily slice through tougher materials while retaining crisp, clean cut lines. The 2mm cutting surface of the Deep Cut Blade also increases its longevity so you can cut thicker materials for a longer time before needing a replacement.