This XL Universal Plate System is from Spellbinders. This system includes seven plate that work in the Platinum manual die cutting machine from Spellbinders (sold separately). This bundle includes one (A) platform base, one (B) platform top, two (C) cutting plates, one (D) Adapter plate, one (E) embossing mat, and one (F) shim. The platform base and the platform top measure 12.9" x 8.58" and all other pieces measure 12.2" x 8.42". These plates, also known as cutting mats, are longer than the old set so they will accommodate slimline dies and larger embossing folders. This system works with most brands of thin metal cutting dies, steel rule dies, and 2D and 3D embossing folders, simply follow the instructions for the correct sandwiches (all of these products are sold separately).