Foam board cutters and knives. Foam board, or foam core, is a strong, lightweight, rigid material perfect for presentations, signs, architectural models, mounting, and more. It's smooth surface accepts screen printing, glue, paint or markers, and cuts cleanly. Rabbet cutters are uniquely designed to cut 3/16" foam board to create perfect 90-degree rabbet edges and joints. An essential tool for model builders. X-ACTO and Alvin foam board knives, foamboard cutters. Foamwerks circle cutter provides easy circles to be cut in Foam Core. Replacement blades available for all foam board knives.