QEP 0.75" Slide Lock Twin Carbide Scoring Knife with Chisel Tip is a professional tool designed for scoring cement and gypsum-based backerboard, heavy laminate, plastic, and vinyl plank flooring. It features a lockable blade for safety and a chisel tip for precision. The knife has a 5" plastic handle and a 2.5" carbide blade. It is backed by a 90-day warranty.