The Pacesetter Backboard Scoring knife is ideal for scoring all types of cement backerboard, laminates, roof tiles, fiberglass and roof shingles.? ?Knife scores the backerboard sheets making the backerboard easy to bend and snap.The knife is equipped with three tungsten carbide tips - two scoring tips and one chisel tip for longer scoring life. Tungsten carbide is one of the hardest materials that can be used for cutting and it outlasts regular steel. Contoured soft grip handle makes work comfortable.