QEP Carbide Scoring Knife SKU: 446870 MODEL: 10015 Sorry, there is currently no online price available for this product.Contact your local store for pricing and availability. Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants With 2 tungsten carbide tips for scoring cement backer boards. Features and benefits Backerboard knife with 3 tungsten carbide tips for scoring cement backerboards. Chisel tip included in handle for easy shaping.