Dungeon Craft: Hell & High Water - Rules of Play says:
Dungeon craft is a loose-leaf book inside a custom box. The pages are a thick 12pt cardstock with a laminate coating to make the pages water-resistant and dry/wet-erase. The book contains 1000 reversible terrain pieces that you can cut out and place on any battle map with a one-inch grid. The terrain covers urban, wilderness, and dungeon terrain. With a collection of creature tokens such as 30 plus skeletons, 30 plus goblins,30 plus knights and so much more. Along with the wide variety of terrain, the reversible pieces allow for an interactive and ever change the battle map as you've never had before. We drew it so you don't have too.