A retractable utility knife for heavy-duty cutting on almost any material, including boards, textiles, wire, some metals, leather, plastic, rubber, vinyl, rope, and more. The design allows the blade to be retracted or extended at three cutting depths. The handle is smooth and balanced, with storage room inside for extra blades. One double-ended carbon steel blade is included. Replacement blades are available in reusable plastic cases of 5 each (AA17980).