1The circular blade has a diameter of 45mm and is compatible with most 45mm rotating cutters. 2Suitable for cutting wool, felt, vinyl, leather, cardboard and other materials. 3Made of stainless steel, the blade is hard and incisive, and it is not easy to wear after longterm use. 4These replacement blades are easy to replace when used, and repair cutting mats can be used to extend their service life. 5The kit contains 10 replacement blades, which are commonly used in various patch-work production.