These new type of blades are nothing short of amazing. The tungsten alloy core of these blades is coated with Titanium Nitride. The blade surface that has high harness and low friction creating a superior blade that outlasts standard blades by 4-5 times. These Titanium blades both economical and convenient. They are ideal for rotary cutting all types of fabrics. This 45mm blade will fit on to all standard 45mm rotary cutter brands. You will be amazed when you try them, super sharp and longer lasting.