The professional snap-off blade knife is the right tool for you if you frequently need to cut heavy materials like roofing felt, plasterboard, thick cardboard or thick sheeting. The ergonomically shaped metal casing ensures that the blade sits comfortably in the hand, and enables you to guide it through the material with maximum power transmission. The metal blade guide also increases the stability. This means that you can perform precise, controlled cuts safely and without fatigue. The integrated locking knob holds the snap-off blade in the desired position so that it sits securely in the guide at all times without any play, minimising the risk of injury. Replacement blades for this durable helper are available to purchase, and can be replaced without tools. Includes one blade.