Use the Easy Rock Carving Tools with Carving Plaster to carve custom rock formations. The Strata tool helps you carve and shape large areas fast to model strata, blasted rock and other weathered and eroded outcrops. Use the Carving Tool Chisel to carve gouges and cavities, and use the Pick to carve grooves, fine-line abrasions and striation markings. The Duster helps keep your carving area free from debris. 3 piece set About Complete Terrain System The Terrain System includes all the products you need to model realistic terrain. These products all work together to make it easy to build any type of terrain for your layouts, displays and other projects. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.