This pair of Cutting Pads was specially designed for use in the Big Shot Pro Machine. Constructed of high-quality polycarbonate plastic, these see-through Cutting Pads allow for easy die-cutting of Sizzix steel-rule dies (Bigz Pro, Movers & Shapers Pro and ScoreBoards Pro) in the Big Shot Pro machine. Simply sandwich the die and material to be cut between the Cutting Pads and roll through the machine. A Premium Crease Pad may be needed in place of one Cutting Pad when die-cutting Sizzix steel-rule dies containing crease rule. Each Cutting Pad measures 14 1/4" x 12 1/4" x 1/8" and lasts for thousands of cuts. All Sizzix Cutting Pads are meant to be used on both sides. When both sides of the Cutting Pads are worn out, it is time for replacement Cutting Pads.