- We R Memory Keepers-Heatwave Pen Tool Starter Kit. Apply foil to cards, scrapbook layouts and other projects. Use the Heatwave Pen with stencils to apply foil designs or create your own (sold separately). A light guide makes it easy to see where you are drawing. This package contains one 7×1-5/8 inch battery operated Heatwave Pen tool with a lid for safe storage and twenty 4×6 inch sheets of foil. Needs three AA batteries (not included). Imported.