The OLFA L-1 is a professional-grade heavy duty utility knife featuring an 18mm wide blade and durable yellow plastic handle. This robust cutting tool is designed for demanding tasks with its sturdy construction and reliable blade locking mechanism. Key features: • 18mm wide heavy-duty blade • Ergonomic yellow handle with anti-slip grip • Ratchet wheel blade lock for secure blade positioning • Durable plastic body construction • Retractable blade design • Suitable for industrial and professional use The L-1 model is part of OLFA's professional series of cutting tools, ideal for cutting through thick materials like cardboard, rubber, linoleum, and other heavy materials. The ratchet wheel lock ensures the blade stays firmly in position during use. The knife's design allows for quick blade changes when needed. For safety, always retract blade when not in use and store away from children.