Simple to use; Place blade or other part in the Tool Steep Wrap; fold over and crimp edges forming an air tight package; place package in oven and heat treat according to metal directions. Placing a small chip of wood inside the foil packet helps to burn up oxygen inside the wrap. Use only once. Cuts easily with scissors.Type 309, annealed stainless steel foil has a maximum temperature of 2200°FThickness: .002”Width: 12”Length: 25’