The Ideas C9944 45mm rotary cutter blade is a high-quality replacement to restore smooth, flawless cutting ability to your rotary cutter. Made of high-hardness tungsten steel with a 45mm diameter, this circular blade offers an extremely sharp edge that cuts through multiple layers of fabric, paper, felt, and vinyl in one go. It features a standard center hole compatible with most 45mm rotary cutters on the market. Its long-lasting sharpness prevents fraying and fraying on fabric edges. It is essential to have in the patchwork studio to replace worn blades and maintain maximum cutting precision.