From what I was told at the Quilt Shop where I bought my mini rotary cuter--they are disposable-there are no replacement blades for this Fiskars cutter. I bought to use on the Twister tool. I have been using my 28mm
cutter and it is easier to handle for small projects. It takes a bit to get used to the finger cutter and the comfortable position for your finger.
Hawaiian quilts are also on my bucket list-I found a pattern book of animal and floral designs for 3.99 at a Half Priced Book store