OLFA 300 snap blade knife is durable, long-lasting utility knife featuring fully adjustable snap-off blade secured by a setscrew. Ratchet blade locking system. Loosen the thumbscrew, slide the blade forward, and tighten to size. A bit larger than other OLFA standard-duty knives for more leverage on tougher cutting projects. One blade included. Uses AB10B, AB10SB, AB50B, AB50S, and A1160B blades. Perfect utility knife for home, school, studio, office, or shop. OLFA lifetime warranty. OLFA #300 snap blade utility knife.