RAZOR SHARP BLADE - Our cutter is preloaded with an ultra sharp 45mm rotary blade made from tungsten steel for unparalleled sharpness and superior edge retention. The concealed blade prevents injury and allows for continual, protected blade exposure. COMFORTABLE & DURABLE HANDLE - The ergonomically curved handle is large enough for a comfortable and sturdy grip, even when wearing gloves. The solid base prevents damage to the surface underneath what you're cutting. TOOL FREE BLADE REPLACEMENT - The Rolled Material Cutter has 12 blade positions that provide safe and easy tool-free blade replacement. Simply unscrew the wingnut and turn the blade to expose a fresh edge. Replace when all blade edges are dull. CUTS A VARIETY OF MATERIALS - Our knife is designed for remodeling, contractors, construction, or landscaping. It's great for cutting rolled surfaces like carpet, paper, linoleum, landscape fabric, temporary floor coverings, and more. OLFA STANDARD - OLFA maintains a standard of cutting excellence regarded by professional tradespeople worldwide for quality and durability. OLFA only uses the highest quality materials to deliver superior blade life in comfortable, sturdy handles.