Wave rotary blade, this steel blade is perfect for 45mm rotary cutter. Easy to cut 5 ~ 15 pieces paper at the same time. Blade can be assembled to either side of rotary cutter for both left and right hand users. It is also suitable for cutting other materials like film, photo, vinyle, and so much more! 5pcs as 1 set in plastic case, now you can take your blades with you with the included carry case that will keep your blades safe and lubricated.