Compact safety knife features a symmetrically shaped, high-impact handle to ensure a comfortable grip no matter how big or small your hand is. To provide greater safety, the knife's spring-activated blade automatically retracts when you take your thumb off the slider. Blade slider is angled to give you greater control. No-tool blade change allows you to quickly replace dull blades without requiring any tools. Safety blade is perfect for cutting corrugated and packaging materials, shrink-wrap, plastic, film, strapping and more.