Our 1/4" Mini ruler feet are made of aircraft grade aluminum. Our feet are 100% machined right here in the U.S.A.. We are the one and only manufacture of this small ruler foot. It is half the size of all other ruler feet on the market. These feet are designed to use with 1/8" this acrylic templates and our specially designed Path Easy tools. We do warranty our foot for life so any problems with the foot we are happy to replace it free of charge.