The OLFA Endurance Rotary Blade 45mm 2/Pkg is a must-have accessory for any sewing enthusiast. With a long-lasting endurance edge, these blades deliver precise cuts on up to eight layers of cotton fabric. Each package contains two 45mm rotary blades and a convenient storage case. Compatible with any 45mm OLFA rotary cutter, these blades are perfect for all your fabric cutting needs.