This is a holder for coasters to make engraving easy! It is designed to hold different size and shaped coasters. You cut it out on the F1 but after finished and assembled, you can use it to engrave coasters on both the D1 and F1. Included in the template, we have provided an easy guide for cutting and/or scoring coasters. It is not required to use and does not directly affect the build, just there incase you'd like to use the settings we use for creating our beautiful coasters.