This special edition rotary cutting comes with the new 45mm Endurance Blade. This blade "Cuts twice as long as a conventional blade" and is made of high quality tungsten carbide tool steel for unparalleled sharpness and superior edge retention. A rolling razor blade that's perfect for all of your sewing and quilting needs. Sharp enough to cut through more than 6 layers of fabric, making quick work of your strip, block, and pattern cutting. Comfortable ergonomic handle reduces hand and wrist fatigue, and dual-action safety lock allows the blade to lock open for comfort and closed for safety.