They are for fussy cutting frames which can go around a photograph etc. As they are thin, you have to have an adapter to make up the thickness needed to put under the roller and you also need a firm cutting mat that goes through the roller as well. I have had good success cutting fabric with my sizzix machine. It works better if you iron the vleisofix onto the back of the material first and leave the paper on until you have cut the shape. Then you can peel the paper of and iron onto your quilt. I have tried other systems but there has been movement of the fabric. This is a reasonable result for the price.